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Power Tool Battery Chargers​

Edit:ShenZhen Dingkangda Technoloy Co., Ltd      Date:May 09, 2016

Power Tool Battery Chargers

Cordless tool battery chargers should also be selected very carefully, because the quality of the charger can greatly determine how long the batteries will last. 

Most of the capacity loss and cycle life reduction that rechargeable batteries experience results from incorrectly charging the batteries or from heat damage during charging. Higher quality chargers have much more sensitive sensors and complicated electronics to ensure that batteries are charged optimally.

Battery chargers can be divided into three main speed categories (these do not apply to Li-Ion batteries):

Slow- These take 14-16 hours to charge nickle based batteries, and will be less expensive than other chargers.

Quick- Charge time of 3-6 hours. It is important to have a quality unit for faster chargers, or they will not switch over to a slower "trickle charge" when the battery is almost full. This is important, because overcharging is one of the major causes of memory effect with nickle based batteries.

Fast- Fast chargers can charge nickle based batteries in about an hour. Fast charging is best for NiCd and NiMH batteries, because it reduces memory effect. Selecting a good unit that switches to "trickle charge" at the right time is also important for fast chargers. 

NiCd & NiMH Chargers:

Buy the fastest charging charger you can afford.

Buy a unit with sensors and electronics that optimize your battery type's charging needs.

NiMH chargers can charge NiCd batteries, but not the other way around.

Li-Ion Chargers:

Li-Ion batteries can only be charged safely one way, at about a 3 hour charge time. Li-Ion charger units that suggest faster charging and decreased capacity loss should be approached with skepticism. Usually, these units only charge the battery to about 70% capacity and damage its long-term performance.

Buy the most expensive charger you can afford. 

Focus on heat reducing features. 

Buy a unit with sensors and electronics that optimize your battery type's charging needs.