Related by context. All words. (Click for frequent words.) 83 portable GPS locator 57 magnetic coil 57 nerve stimulator 56 microelectrode array 55 myoelectric 55 pulse generator 54 neurostimulator 54 surgical staplers 54 occipital nerve 54 muscle stimulator 53 carotid sinus 53 electrodes implanted 53 glucose sensor 52 spinal cord stimulator 52 piezoelectric crystal 52 sends electrical impulses 52 electrically stimulates 52 nerve stimulators 52 transcranial magnetic stimulation TMS 52 electro optic modulator 51 functional electrical stimulation 51 occipital nerves 51 stimulating electrodes 51 neuroprosthetic 51 batteries ultracapacitors 51 ablation catheters 51 radiofrequency RF 50 sensor node 50 electroactive polymer artificial 50 Spinal cord stimulators 50 nanomotor 50 implantable gastric stimulator 50 MEMS microelectromechanical systems 50 EEG biofeedback 50 bioelectric 50 stimulator 50 Abbott Laboratories Norvir 50 stopwatch sized 50 neurostimulators 50 pulsed electromagnetic field 50 microgenerator 50 implanted stimulator 50 sinus node 49 piezoelectric actuator 49 Chemetics R 49 retinal prosthesis 49 Monebo 49 neural prosthetics 49 bioelectronic 49 stimulation TENS 49 brain stimulators 49 circuitries 49 RF transmitter 49 Nerve Stimulator 49 defibrillator pacemaker 49 retinal implants 49 pulser 49 transdermal patches 49 upper torso swivels 49 microsystem 49 electrical stimulation 49 pill dispenser 49 rechargeable neurostimulator 49 Electrical stimulation 49 parathyroid glands 49 A1CNow + 49 Emotiv headset 48 biothermal 48 piezoelectric transducer 48 Vagus nerve 48 lensless imaging 48 MotionPod 48 microfluidic chip 48 electrical pulses 48 device LVAD 48 magnetic coils 48 implantable devices 48 plogg 48 biohybrid 48 spinal cord stimulation 48 microdevice 48 battery charger ICs 48 bionic limbs 48 implanting pacemaker 48 USB transceiver 48 resembling metal shavings 48 nerve stimulation 48 Attain Ability 48 microbots 48 optic fibers 48 MyGlucoHealth 48 stimulated electrically 48 microsensor 48 tan wrappings 47 auditory nerves 47 Merci Retrieval System 47 NESS L# 47 neuromuscular electrical stimulation 47 nanomotors 47 alpha rotary 47 NESS H# 47 catheter ablations 47 implantable cardiac 47 BrainGate 47 Institute ETRI 47 pneumatic hydraulic 47 suture anchor 47 neural stimulation 47 diathermy 47 anastomotic devices 47 Insulin pumps 47 f ENGINE 47 implanted electrodes 47 VBLOC 47 ablate cardiac tissue 47 vagus nerve 47 AV node 47 automated radiopharmaceutical distribution 47 Neurostimulation 47 hypoglossal nerve 47 cardioverter defibrillator 47 noninvasive technique 47 iPill 47 Freespace motion 47 HepaMate ™ 47 canula 47 unclog arteries 47 implantable device 47 Ballbot 47 A1CNow 47 transcutaneous electrical nerve 47 neural prostheses 47 electromagnets 47 MYO VAD 47 resembled metal shavings 47 breakthrough MRgFUS technology 46 blood glucose meter 46 PressureWire Certus 46 scar tissue encapsulating pacing 46 ADI iMEMS 46 BrainGate System 46 piezo electric 46 near infrared spectroscopy 46 robotic manipulator 46 electromagnet 46 Cardiac resynchronization therapy 46 electrode array 46 isometric exercise 46 biventricular pacemaker 46 scalp electrodes 46 Left Ventricular Assist Device 46 cardiac pacemakers 46 involves implanting electrodes 46 nanogenerators 46 cryogenically cooled 46 Spinal Cord Stimulation 46 phenylalanine hydroxylase PAH 46 optical biosensors 46 catheters guidewires 46 Cytori Celution System 46 bi phasic 46 Enable valve 46 EndoPAT 46 cachexia anti infectives 46 Merci Retriever 46 predictive diagnostics 46 holographic telepresence 46 stents balloon catheters 46 microbattery 46 diseases osteoarthritis osteoporosis 46 external fixator 46 micromechanical 46 replacement trauma craniomaxillofacial 46 Implantable 46 nanoprobes 46 artificial retinas 46 i Limb 46 Neurosky 46 Dimetra IP Compact 46 near infrared spectroscopic 46 nanosensor 46 capsule endoscope 46 electrical impulses 46 autonomic nervous 45 MERCI Retriever 45 Medtronic implantable 45 artificial sphincter 45 muscle stimulators 45 Ocean Treader 45 telescoping mast 45 neuromodulators 45 Peritoneal dialysis 45 Thoratec HeartMate II 45 haptic interface 45 CAN BUS 45 upper chambers atria 45 stimulator implanted 45 miniaturized implantable 45 Intrinsic ID 45 implantable glucose 45 catheter inserted 45 inductive sensors 45 please explore www.electrovaya.com 45 nanobattery 45 electrode pads 45 handcrank 45 retinal implant 45 electrical currents 45 Magnetic Resonance MR 45 Physio Control wholly owned 45 microsensors 45 inertial sensor 45 programmable microcontroller 45 EnRhythm MRI SureScan pacing 45 microbatteries 45 vagus nerve stimulation 45 tunable optical 45 Smart grids 45 GORE TAG Device 45 myoelectric arm 45 Sunverge 45 radiofrequency waves 45 Skinput 45 cardiac resynchronisation therapy 45 surgical implantation 45 Anti Bacterial Envelope 45 electromagnetic coils 45 nanofluidics 45 photoactivation 45 device 45 electrodes 45 ErgoMotion 45 SmartHand 45 bowel bladder 45 bion 45 irregular bowel movements 45 AlphaCor 45 ViKY 45 ablation therapy 45 bioartificial liver 45 Clot Busting 45 nausea vomiting vertigo 45 synovial membrane 45 magnet Tani 45 surgically implanted 45 micropumps 45 Algiz 7 45 enhanced external counterpulsation 45 wrists elbows 45 vascular anatomy 45 infrared emitters 45 photocell 45 cardiac pacemaker 45 nanorobots 45 micro electromechanical 45 Levitronix 45 resemble asthma inhalers 45 HeartNet 45 multifunctional nanoparticles 45 Corventis 44 minimally invasive technique 44 Optical coherence tomography 44 ablation procedures 44 generating solar arrays 44 superconducting magnetic 44 spintronic device 44 electrical stimulator 44 Bluetooth transmitter 44 neurostimulation 44 nanosensors 44 Unifying receiver 44 microswitches 44 Avandia Actos 44 PROPRIO FOOT 44 cardioverter defibrillators 44 polyarticular symmetrical subtypes 44 nanodevice 44 metastatic lymph nodes 44 magnetically levitated trains 44 superconducting quantum interference 44 TNFR Fc 44 micromachines 44 Eon Mini 44 defibrilator 44 trachea windpipe 44 microelectronic devices 44 osteoarthritis degenerative 44 zeroG 44 PIT tags 44 fluoroscope 44 microprocessing 44 Wave Treader 44 genetically engineered viruses 44 neural implants 44 ultrasound magnetic resonance 44 AMPLATZER ® 44 Defibrillation 44 cochlear nerve 44 bioartificial 44 Cardiac Resynchronization Therapy 44 OxiMax 44 doctors implanted pacemaker 44 Emotiv EPOC 44 EXCOR 44 resynchronize 44 GaN transistors 44 LifeTree ICTM 44 piezoelectric sensors 44 electroencephalograph 44 cardiac defibrillators 44 Emotiv Systems 44 Neural Interface System 44 computed tomography CT scanner 44 nanowire transistors 44 neurovascular diseases 44 electrosurgical generator 44 rhythmic disturbances 44 implantable cardiac devices 44 emWave 44 AFrame Digital 44 RF4CE 44 MPR# [001] 44 disposable catheter 44 MedGem 44 piezoelectric motors 44 Levacor TM 44 dexterous manipulation 44 Nanosensors 44 fluidics 44 neuro stimulation 44 ablation catheter 44 Implanted 44 AMSC HTS wire 44 electrode arrays 44 HeartAssist 5 44 CleveMed 44 piezo actuator 44 pneumatic compression 44 biventricular pacing 44 reconstructive implants 44 Positron emission tomography PET 44 karabiner 44 cardio defibrillator 44 photonic circuits 44 Carbon nanotube 44 biochip 44 Intravascular Ultrasound IVUS 44 treat irregular heartbeats 44 pager sized 44 Artis zeego 44 regulate heartbeats 44 nanoelectronic devices 44 LocationFree Base Station 44 pelvic girdle 44 SpideRX 44 cardiac defibrillator 44 ProSanos 44 Heartmate II 44 Nicolelis 44 treating degenerative diseases 44 robotic exoskeleton 44 synthetic grafts 44 epigenomics 44 microcurrent 43 magnetoencephalography MEG 43 cartilage cushioning 43 VectorVision 43 pacemaker defibrillator 43 Sofradir EC 43 vagus nerve stimulator 43 tPEMF tm 43 NMR MRI 43 electromedical 43 Infrared sensors 43 BrainGate Neural Interface 43 epicardial 43 proximal radius 43 belay device 43 silicon resonators 43 photometers 43 percutaneously 43 resynchronization devices 43 atrial tachyarrhythmias 43 BlueCore7 43 manufactures miniaturized implantable 43 sensor arrays 43 MEMS microelectromechanical 43 nano electromechanical systems 43 nanolasers 43 Nonin Medical 43 Coronary stents 43 Stoneware webNetwork 43 bone conduction 43 phrenic nerve 43 Coblation 43 Passive RFID tags 43 implantable 43 tri axis accelerometer 43 Cochlear implants 43 POWER KNEE 43 pacemakers defibrillators 43 bionic legs 43 MotionPower ™ Heavy 43 radiopharmaceutical distribution 43 dangling uselessly 43 controlled analgesia 43 cadaver bone 43 Dacron graft 43 triaxial accelerometer 43 esophageal sphincter 43 electrode implanted 43 implantable cardioverter 43 infrared sensing 43 Novalung 43 elastic tubing 43 integrated circuits RFIC monolithic 43 robotically controlled 43 Implantable cardioverter defibrillators ICDs 43 i LIMB Hand 43 massively parallel DNA sequencing 43 Proteus Biomedical 43 silicon modulators 43 PMBus protocol 43 image intensifiers 43 coronary endothelial 43 Enlite Sensor 43 SoftScan ® 43 Reeve diaphragm 43 Dr. Eli Peli 43 silicon nitride ceramic 43 neurostimulation devices 43 implantable neurostimulation 43 IEEE #.#.#/ZigBee wireless 43 stents pacemakers 43 Anti Gravity Treadmill 43 targeted muscle reinnervation 43 intravenous catheters 43 Laser VCSEL 43 Septic arthritis 43 craniomaxillofacial 43 wire mesh tubes 43 diseases bone metastasis 43 optogenetics 43 Brd4 43 vaporize arterial blockages 43 inchworm 43 OrthoGlide 43 ultrasonic sensor 43 proximity sensing 43 i Cybie 43 myoblast therapy 43 nanosystems 43 Liquavista displays 43 minuscule particles 43 emit electromagnetic radiation 43 sensor 43 suggest Roche Invirase 43 pulsatile 43 Todd Kuiken 43 fingernails muscle cramps 43 ReWalk 43 implantable lenses 43 CareEngine ® System 43 Find NOOK 43 Ventricular Assist Device 43 bio mimetic 43 superparamagnetic iron oxide nanoparticles 43 VentrAssist 43 QuantumFilm 43 InterStim 43 Millimeter wave 43 iBot 43 stents coated 43 Acrobot 43 Rare Earths processor 43 Skyhook Wireless Wi Fi 43 BrainPort 43 Bionic Leg 43 involves implanting 43 Européenne Mark 43 Dr. Todd Kuiken 42 Silicon Germanium 42 transfection reagents 42 neural prosthetic 42 XML : Comma 42 multiphoton microscopy 42 GentleWaves 42 Rheos System 42 bioelectrical 42 biliary stents 42 nanoneedle 42 electrosurgery 42 miniaturized sensors 42 vascular stents 42 BIS VISTA 42 telescopic rod 42 reinnervation 42 BodyGem 42 Provacel TM 42 grasper 42 capacitive touch sensors 42 CEA LIST 42 hole gaped 42 magnetic resonance imagers 42 peduncle wrist 42 BIOTRONIK Home 42 microcatheter 42 defibrillation leads 42 nanotechnology microsystems 42 Victhom discovers develops 42 deflectable 42 Implantable cardioverter defibrillators 42 REVO pacemaker 42 fluorescence resonance energy 42 stents catheters 42 QMEMS 42 Dip Pen Nanolithography ® 42 trembling mule 42 Lokomat 42 residual limb 42 Perfusion CT 42 Electrocardiogram ECG 42 wrist splints 42 nicotine cartridge 42 vascular grafts 42 wearable sensors 42 Insulin Pumps 42 electrode 42 multimodality imaging 42 piezoelectricity 42 Textronics 42 ARM9 core 42 circuitry 42 devices 42 cardiac resynchronization 42 Kleenex Clorox 42 EnRhythm MRI 42 gastric tube 42 hydraulic pistons 42 cardioversion 42 diseased aortic valve 42 neuroprosthetic devices 42 DE Ndukwe Kalu 42 bi ventricular 42 QT# [001] 42 disorders infectious diseases 42 electroencephalographic EEG 42 rechargeable lithium ion batteries 42 neoplastic diseases 42 microrobots 42 respiratory gating 42 CitySense 42 TAVI procedure 42 Smart Sensors 42 calorimetry 42 auto allo 42 Manmade DNA 42 Optiqua 42 percutaneous catheter 42 nanoelectromechanical systems 42 OLED XL 42 implantable pacemaker 42 Eon Mini neurostimulator 42 SQUIDs 42 InnerCool endovascular 42 PET Positron Emission Tomography 42 Symetron TM 42 CellScope 42 neuroprosthetics 42 implantable cardiac pacemaker 42 Polar Electro 42 clot dissolving drug 42 cardiac defibrillator implanted 42 Chipped offAussies set 42 deltoid muscles 42 Holter monitor 42 hydraulic piston 42 FreeStyle Lite blood glucose 42 transesophageal echocardiography 42 Synchrony lens 42 SightSensor 42 pacemakers implantable cardioverter defibrillatorsHELB 42 BioMark HD System 42 Ascension Orthopedics 42 vacuuming robots 42 ZigBee/#.#.# 42 microRNA profiling 42 Reflex IPS 42 SURVEYOR Scan 42 electrochemical sensors 42 NiZn 42 VeloMini 42 iScience 42 HeartMate XVE 42 products ferroalloys hardware 42 cartilage regeneration 42 fluidjet 42 microfabrication techniques 42 WalkAide 42 Timescape ™ 42 kidney dialysis machine 41 CAP XX supercapacitors 41 grid V2G 41 Axial Flux 41 proprietary GelSite R 41 cardiovascular stents 41 steroid eluting 41 pump IABP 41 NIR spectroscopy 41 Bioness 41 RFID transponder 41 proprioceptive 41 Silicon nanowires 41 DuraHeart LVAS 41 instance Saffo surmises 41 extremist Rwandan Hutu 41 pacemaker 41 medicated stent 41 ECG electrodes 41 microplate instrumentation 41 EEG headset 41 cortical simulator 41 photocatalysts 41 erratic heartbeats 41 elemental analyzers 41 biomarker identification 41 underlying CSRV 41 parathyroid gland 41 biofluids 41 cochlear ear 41 Brake Assist PLUS 41 Magnetic levitation 41 angioplasty stents 41 cHTS 41 venous drainage 41 Synovial fluid 41 COGNIS CRT D 41 iglucose 41 M# Blade 41 Prostheses 41 Myomo 41 hydrogel nanoparticles 41 Artida 41 OLED microdisplay 41 noninvasive ultrasound 41 Superconducting materials 41 x ray computed tomography 41 GeckoImager ™ 41 epidural stimulation 41 opto acoustic 41 sternum strap 41 biosensors 41 DuraHeart 41 biological molecules 41 MI #XM 41 radar lidar 41 OZMO# 41 Skyhook Wi Fi 41 cannulae 41 MicroCHIPS 41 microelectromechanical systems MEMS 41 vibrometer 41 tissue plasminogen activator tPA 41 Cognigen robust 41 TrueBeam STx 41 implanted pacemakers 41 Transim 41 spintronic devices 41 superconducting wires 41 FotoNation FaceTracker 41 NMR LipoProfile test 41 bone stimulator 41 ionized molecules 41 Ventricular Assist Device VAD 41 biosensing 41 cardiac septal repair 41 ultrahigh frequency 41 SenGenuity 41 Nerve Stimulation 41 MPC #W# 41 McSleepy 41 Robotic Exoskeleton 41 converts kinetic 41 PCMOS 41 capacitive coupling 41 Neural Signals Inc. 41 micro fluidics 41 surgically implanting 41 electrical conduction 41 bionic ear 41 nanochips 41 nickel titanium alloy 41 microdevices 41 nanomachines 41 AMPLATZER 41 optofluidic microscope 41 velcro strap 41 implantable cardioverter defibrillators ICDs 41 magnetoresistive random access 41 rhythm abnormalities 41 neuromorphic 41 utilizing magnetically responsive 41 superconducting cables 41 throughput mass spectrometry 41 axis accelerometers 41 miniaturising 41 Ancure device 41 arterial grafts 41 Marcellin Little 41 implanted cardiac 41 al Fireji resign 41 electrocardiograph 41 intravascular stent 41 intraoperative imaging 41 MEMS accelerometers 41 picosecond laser 41 thermometers barometers dental amalgams 41 Welch Allyn Connex 41 anticlotting drugs 41 NeuroArm 41 spectroscopic imaging 41 Hip protectors 41 Corus CAD 41 defibrillators pacemakers 41 GORE TAG ® 41 implanted pacemaker 41 gauge hypodermic needle 41 Darkfield Laser Tracking 41 extracorporeal membrane oxygenation 41 Nokia Morph 41 synovium 41 Pulsing multicolored diodes 41 CorCap 41 defibrillator CRT D 41 laser optics 41 ADXL# 41 Ekahau tags 41 RESTful architecture 41 implant defibrillator 41 shoe insoles 41 battery powered 41 NXP SmartMX 41 embolectomy 41 INVOS Cerebral Somatic Oximeter 41 MT#P# 41 BioSTAR ® 41 men attaching parasail 41 attocell 41 metabolism oxidative 41 cobalt chromium stents 41 CAT scanners 41 elastic cord 41 catherization 41 #.#T MRI 41 OmniVision OV# 41 MotionPower TM Heavy 41 aspheric optics 41 #dpi laser 41 implantable RFID 41 N#C HSA 41 ambulatory cardiac 41 electro optic sensors 41 angioplasty balloons 41 LPS Flex Mobile 41 implantable neuromodulation 41 EEGs 41 dSLIM 41 imaging MRI 41 HeartMate II LVAS 41 Gubbiya 41 SMaL Camera 41 include Arthrizyme TM 41 physiological parameters 41 dental handpieces 41 iMEMS ® 40 Raman spectrometers 40 aberration corrector 40 biosynthetic cornea 40 titanium prosthesis 40 TXU Energy iThermostat 40 cushioning cartilage 40 PEEK Altera 40 irreversible electroporation IRE 40 HDI Dune Home 40 EKG readings 40 CryptoFirewall 40 benign prostate hyperplasia 40 Implantable Cardioverter Defibrillator ICD 40 FibroScan ® 40 bone grafts 40 Electrodes implanted 40 L L Glutamine 40 OpenSTAGE 40 metabolite profiling 40 SMaL 40 LifeModeler 40 Masimo SET Pulse Oximetry 40 Bioabsorbable 40 nanometer CMOS process 40 BIRMINGHAM HIP Resurfacing 40 wire bondable 40 PET tracers 40 anticlotting drug 40 brachial plexus nerves 40 wound vac 40 Solidus Biosciences 40 imaging spectroscopy 40 pulmonary artery pressures 40 terahertz spectroscopy 40 heart arrhythmias 40 electrode sensors 40 urate crystals 40 Kinesia 40 carbon nanotube transistors 40 ITER fusion 40 electrochemical sensor 40 X ray detector 40 lubricate jammed solar 40 Atmel picoPower 40 CRT ICD 40 Good Nite Lite 40 superconducting wire 40 regenerating tissues 40 Visioneer OneTouch ® 40 accelerometers gyroscopes 40 VitalStim 40 ThermoSuit System 40 Powerful debug 40 rear propeller shaft 40 Continuous glucose 40 DisplayLink USB graphics 40 Russ Tedrake 40 interventional suites 40 Labguard 40 ProDigits 40 Arteris NoC solution 40 Hip replacements 40 chemokine pathways 40 GridRouter 40 biologic pathways 40 Verenium Specialty Enzyme 40 implantable cardioverter defibrillator 40 millimeter wave circuits 40 Silicon germanium 40 bladder sphincter 40 ophthalmoscope 40 VEPTR 40 non dispersive infrared 40 microfluidic chips 40 ventricular reconstruction 40 holter 40 dobutamine 40 InSync Sentry 40 Computed Tomography CT scans 40 severed spinal cords 40 ModularBCD 40 Oxinium 40 fuse vertebrae 40 brain stimulation 40 tunable filters 40 biopsy forceps 40 Scanning Tunneling Microscope 40 MED EL 40 #.#x#.#mm 40 microprocessor 40 MMA#Q 40 biopharma gene 40 ultracold molecules 40 Pierpaolo Petruzziello 40 Tibion 40 protein biochip 40 Navitraq V 40 HYmini 40 stent wire mesh 40 resonance imaging 40 microelectromechanical system 40 AtriClip 40 Identification RFID 40 wide bandgap semiconductors 40 gastric bands 40 licenses bioactive coatings 40 MagicColor 40 Omnyx LLC 40 PRO TOE ™ 40 xCELLigence 40 Mercouri Kanatzidis 40 atrial ablation 40 cardioplegic arrest 40 metering ICs 40 #V LDMOS 40 Transmeta LongRun2 40 rechargeable lithium 40 AngioJet 40 Vagus nerve stimulation 40 implantable cardiac defibrillators 40 CK#ex 40 Global Positioning Satellites 40 minimally invasive cardiac 40 Heartmate 40 leadless 40 AIDC technologies 40 Brinavess 40 PetsCell 40 Implanted defibrillators 40 converts sunlight 40 Fluid Status 40 Circulating Tumor Cell 40 vaginal sling 40 Walkman Obit Remembering 40 BlueTooth enabled 40 Fingertip Digitizer 40 qdots 40 Sonamba 40 Vitatron 40 Homayoon Kazerooni 40 disposable catheters 40 RECEPTORS LLC 40 vPower 40 metal shavings inside 40 visuomotor 40 arrythmia 40 gastrostomy tube 40 neurological pathways 40 Prof. Gefen 40 Toshiba EasyGuard 40 VeeLo NextGen 40 hydrokinetic turbines 40 regenerative 40 transceiver module 40 pulse oximeters 40 osseointegration 40 iStep 40 Capt. Olivier Hamuli 40 SensL 40 fatal arrhythmias 40 Automatic external defibrillators 40 SureScan 40 electron tubes 40 lower chambers ventricles 40 damaged spinal cords 40 biomolecular interactions 40 wide necked aneurysms 40 fixator 40 e compass accelerometer 40 adaptive shock absorber 40 Swan Ganz catheter 40 implantable cardiac device 40 combiner boxes 40 Ventricular fibrillation 40 Murata Manufacturing Co. 40 VFS# 40 graphene transistor 40 Bair Hugger 40 lasers optics 40 implantable cardiac pacemakers 40 caries detection 40 shockwave therapy 40 neo bladder 40 Forwardscatter 40 pacemakers implanted 40 bionic limb 40 scoliosis bursitis sciatica headaches 39 treat brain aneurysms 39 KillaCycle 39 Gentag 39 optoelectronic packaging 39 pedicle screws 39 Panasonic iA 39 DS# HC 39 SEMATECH FEP 39 SpineAssist 39 spinneret 39 rhythm disturbances 39 resynchronization 39 Russian Orlan MK 39 nanomedical 39 shunt implanted 39 multifocal lens 39 resynchronization therapy 39 Telenoid 39 Active RFID tags 39 beamformer 39 patented digital watermarking 39 Assist Device 39 pacemakers 39 TCAD Sentaurus 39 neural prosthesis 39 cardiopulmonary bypass CPB 39 optofluidic 39 Infinity OneNet 39 Brilliance iCT scanner 39 molecular biology genetics 39 diseased arteries 39 biliary stent 39 malpositioned 39 orthosis 39 electrical jolts 39 Elekta Axesse 39 NiCad batteries