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Making the Power Tool Battery Decision: NiMH vs. NiCad vs. Li-Ion

If you've ever wondered about the difference between NiMH vs. NiCad vs. LiIon you're not alone - there are thousands of DIY home improvement types out there wondering the same thing as you, and wondering how to make the best decisions for their next power tool purchase.

Here's a question you may be asking yourself: "What is the difference between NiMH and NiCd. How do Lithium Ion batteries work compared to the others?"

To tackle this question we have to look at the criteria for making the power tool battery decision. And then bring Lithium Ion into the equation to round out the choices when you're next making a power tool purchase decision.

Read closely - your power as a consumer lies in your understanding of the products available!

Criteria for Making Your Power Tool Battery Decision
According to Building a Better Power-Tool Battery you should be looking at a battery's run time, life cycle, volts and amp-hour rating.

Run Time:
Quite simply run time is the amount of work a tool can do before its charge runs out.

Life Cycle:
Life cycle is how many times the battery can be recharged during its life time.

Volts (Power):
Volts will determine work output of the tool. John Sara, cordless product manager for Milwaukee Electric Tool, says "Individuals currently using a 18-volt NiCad battery, should see 2 - 21/2 times more work output from a V28."

Amp-Hour Rating
The higher the Amp-Hour rating the longer the battery lasts - be aware that power tool batteries of the same voltage will often have different Amp-Hour ratings.

NiMH vs. NiCad vs. Li Ion: Picking What's Right for You

Nickel metal hydride (NiMH) Batteries:
I don't think I could define it better than wiki pedia: 'A nickel metal hydride battery, abbreviated NiMH, is a type of rechargeable battery similar to a nickel-cadmium (NiCd) battery but has a hydrogen-absorbing alloy for the anode instead of cadmium. Like in NiCd batteries, nickel is the cathode.'

Nickel metal hydride (NiMH) advantages:
-- lighter than NiCad
-- 2-3X capacity to equal size NiCad

Nickel metal hydride (NiMH) disadvantages:
-- fewer life cycles compared to NiCad
-- shorter run time
-- performs the worst in cold temperatures, so keep that in mind if you plan to use tools powered by NiMH outdoors in cold weather
-- higher self-discharge level than NiCad
-- voltage drop at near-discharged levels

Nickel cadmium (NiCd) Batteries:
According to Wiki pedia: the 'nickel-cadmium battery (commonly abbreviated NiCd and pronounced 'nye-cad') is a popular type of rechargeable battery for portable electronics and toys using the metals nickel (Ni) and cadmium (Cd) as the active chemicals.'

Nickel cadmium (NiCad) advantages:
-- longer life cycles
-- performs in cold temperatures (perform well to 20F)
-- lower self-discharge level than NiMH
-- no voltage drop at near discharged levels

Nickel cadmium (NiCad) disadvantages:
-- Heavy, making it harder to use for longer periods of time
-- May suffer from 'Memory Effect' or 'False Bottom Effect' if constantly discharged half-way and then recharged (wiki pedia)

The Lithium ion (Li-Ion) Battery:
The new comer to power tool batteries, Lithium Ion are hot because they have 'one of the best energy-to-weight ratios, no memory effect and a slow loss of charge when not in use,' according to Wiki pedia.

Lithium ion (Li-Ion) advantages:
-- High performance in cold weather - to 0F - great for winter outdoor use
-- Light weight. You can lift tools powered by Lithium Ion over your head all day.
-- Increased life cycles over NiCad and NiMH, so it keeps going past other batteries
-- more rapid charge times that get you back on the job more quickly

Lithium ion (Li-Ion) disadvantages:
-- less tested than other battery formats - in early stages of development
-- has a shelf life based on life of battery, not related to charge or charge time
-- can sometimes erupt or explode in high heat - hot cars, direct sunlight, etc, or sometimes after tampering. a more dangerous battery than the others
-- permanent damage to battery if stored at too-low discharge level, so be careful and keep these charged well

What battery is right for your power tool decision? Clearly there are many different options, and many different pluses and minuses for each battery type. That's why it's imperative that you come to your purchase prepared with knowledge that will help you make the right decision for your situation.

Plus you are certain to impress the guys at the big box tool depot when you display your knowledge about the different types of batteries and their different merits.

Now you know what to look for - life cycles, run time, volts and Amp-Hours and you know the three major battery types. I hope that with that information you'll be better equipped to make the decision between a NiCD, NiMH or Li-Ion battery!

About the Author

Garrett French is the Editor for ToolCrib.com.

At www.ToolCrib.com you can find and compare tools, catch up on the latest topics and debates at the power tool blog and save tons of money on power tools by subscribing via rss or email to our power tool deal of the day.

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Combo: 44pcs Tenergy NiMH Rechargeable Batteries (24AA/12AAA/4C/4D) $179.99 High quality AA/AAA/C/D size high capacity nickel hydride metal (NiMH) rechargeable batteries Super long running time with high capacityAA (2600mAh), AAA (1000mAh), C (5000 mAh) and D (100000 mAh) Economic 44 battery package provides huge savings and for all your battery needs Very long life time means thousands of dollars in savings by eliminating the need to buy hundreds of throw away Alkaline batteries. A similar throw away battery package like this would cost you $15 - $20, but they can be used only once. Exact replacement for standard AA/AAA/C/D size batteries and NiCd rechargeable batteries Convenient operation due to the advantage that NiMH batteries has no memory effect. Can be charged anytime Can be rapidly charged with smart chargers and universal chargers Batteries tested based on International Electronic Commission (IEC) standard to ensure capacity, quality and life time Technical SpecificationSize Capacity Weight Dimensions Voltage Standard Charge Rapid ChargeAA2600 mAh28gH50.5XD14.5mm1.2V15 hours @ 180 mA2.4 hrs @ 900 mAAAA1000 mAh12gH44XD11mm1.2V15 hours @65 mA1.5 hours @650 mAC5000 mAh57gH43XD23mm1.2V15 hours @ 300 mA2 hours @ 3000 mAD10000 mAh165gH60XD33mm1.2V15 hours @ 800 mA2.5 hours @ 4000 mAOther NiMH Rechargeable Battery Combos Also Available Looking for AA Only Battery Combos? Click Here Looking for AAA Only Battery Combos? Click Here Looking for C Only Battery Combos? Click Here Looking for D Only Battery Combos? Click Here Looking Other Battery Size Combo Kits? Click Here Looking for Charger Combo Packages? Click Here

Combo: 24pcs Tenergy NiMH Rechargeable Batteries (8AA/8AAA/4C/4D) $149.99 High quality AA/AAA/C/D size high capacity nickel hydride metal (NiMH) rechargeable batteriesSuper long running time with high capacityAA (2600mAh), AAA (900mAh), C (5000 mAh) and D (10000 mAh) Economic 24 battery package provides huge savings and for all your battery needsVery long life time means thousands of dollars in savings by eliminating the need to buy hundreds of throw away Alkaline batteries. A similar throw away battery package like this would cost you $15 $20, but they can be used only once.Exact replacement for standard AA/AAA/C/D size batteries and NiCd rechargeable batteriesConvenient operation due to the advantage that NiMH batteries have no memory effect. Can be charged anytimeCan be rapidly charged with smart chargers and universal chargersBatteries tested based on International Electronic Commission (IEC) standard to ensure capacity, quality and life time Technical Specifications Size Capacity Weight Dimensions Voltage Standard Charge Rapid Charge AA 2600 mAh 28g H50.5XD14.5mm 1.2V 15 hours @ 180 mA 2.4 hrs @ 900 mA AAA 1000 mAh 12g H44XD11mm 1.2V 15 hours @65 mA 1.5 hours @650 mA C 5000 mAh 57g H43XD23mm 1.2V 15 hours @ 300 mA 2 hours @ 3000 mA D 10000 mAh 165g H60XD33mm 1.2V 15 hours @ 800 mA 3 hours @ 4000 mAOther NiMH Rechargeable Battery Combos Also Available Looking for AA Only Battery Combos? Click Here Looking for AAA Only Battery Combos? Click Here Looking for C Only Battery Combos? Click Here Looking for D Only Battery Combos? Click Here Looking Other Battery Size Combo Kits? Click Here Looking for Charger Combo Packages? Click Here

Rayovac PS20PLGEN Hybrid PS20 Universal NiMH Battery Charger $44.81 Handy unit recharges any standard NiMH battery up to four AAs AAAs Cs or Ds and up to two 9Volts at once. Internal individual cell monitors and isolated current paths prevent under and overcharging. Tricklecharge setting helps maximize cell life. Automatic shutdown and batteriesready LED indicator ensure safe streamlined operation. Battery Type: NiMH; Battery Size: 9V; AA; AAA; C; D; Battery Capacity: N/A; Battery Chargers Special Features: TrickleCharge Setting.

Nokia 918 Series 1200mAh NiMh Battery $18.92 Nokia 636/ 638/ 918 ATT 3815 Battery Nickel Metal Hydride (NiMh) Black Extended life Battery offers 1200 mAh battery capacity1200 mAh capacity offers much longer use between battery charging for the Nokia 636/ 638/ 918 ATT 3815 cellular phone user. This aftermarket battery features powerful Nickel Metal Hydride technology so there is no memory effect either Aftermarket battery is rated at 1200 mAh highcapacity. This Extended life battery gives you the longest talk standby times Note that a new nickel metal hydride battery s full performance is only achieved after the initial 23 complete charge and discharge cycles. Environmentally Friendly. Our One year warranty is easier than the factory warranty if you should need itSupported Models and Categories:Nokia 918 cellular accessories

Combo: Tenergy T-6280 Smart 8-Bay AA/AAA NiMH Battery Charger + 16 AA Premium NiMH Batteries $70.79 .r1 {color#900;}T-6280 IC-Controlled 8 Channels Ni-MH Smart Battery Charger (100V-240V) with Car Adaptor Specially designed for rechargeable batteries used in digital and audio productsRecharges 1-8 pcs AA and AAA batteries at a time8 independent channels with individual LED display for proper charge, discharge & trickle chargeIntelligent microprocessor controlledWith negative delta V cut-off functionNi-MH batteries can be mixed to charge at the same timeTemperature sensors to avoid the battery from being damaged by over-heatingWith mechanical & electrical protection against wrong polarityWith maximum charging timer control for overcharge protectionWith 12V car charging function Tenergy Premium AA 2500mAh high capacity NiMH Rechargeable Battery Premium quality Ultra High Capacity AA Size rechargeable Nickel Metal Hydride (NiMH) battery, New Products!!Exact replacement for standard AA size battery in all the devicesProvides ultra long use time per charge with this ultra high 2500 mAh capacityAdvanced NiMH technology means twice as long use life per charge than the ordinary rechargeablesDesigned for enhanced performance for high drain applicationssuch as digital cameras, CD players, portable audio devices, hand heldgames, 2way radios, PDAs, and other portable high drain digitalelectronicsCan be recharged up to 1000 times, providing big savings by replacing hundreds of throw away AA batteries.Convenient operation without memory effect. Can be charged anytime.Can be rapidly charged with any quick charger, smart chargers, plug in charger or universal chargersWeight per cell 1.1ozDimensionsDiameter:14.5mm, Height50.5mm6months warrantyBattery tested based on International Electronic Commission (IEC) standard to ensure capacity, quality and life time Download product manual here. Other NiMH Rechargeable Battery Combos Also Available:Looking for AA Only Battery Combos? Click HereLooking for AAA Only Battery Combos? Click HereLooking for C Only Battery Combos? Click HereLooking for D Only Battery Combos? Click HereLooking for Mix of Various Size Battery Combo Kits? Click HereLooking for Charger Combo Packages? Click Here

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