charge Batteries

Cordless Drill Batteries
To all those nay-sayers insisting that using NiMh batteries as a substitute for NiCads is dangerous or will give poor results. I just want to post my Actual Experience compared with your 'theories'. It's been two years since I performed this mod, and I have had NO troubles. The batteries have out-performed the original batteries in terms of run-time and overall life of the cells themselves. I have not recorded test data on the run-time, but I would estimate that the run-time is about twice that of the originally battery pack. Both of the original NiCad packs refuse to hold a charge for any reasonable amount of time within a year of purchase (that is what inspired the mod).(Cordless Drill Battery) I mentioned my accidental reverse polarity charging accident in another comment below (over a year ago), but even with that abuse, the same NiMh batteries are still going strong.As for charging the batteries - everyone has their theory about charging, but I'll say that I've been using the original NiCad charger without any modification. My reason is two-fold. first: The original inspiration for this mod was to SAVE money and get longer run-time on the drill. (My $24 investment has been successful )nest: The supplied Nicad Charger was designed to charge a lower capacity battery, so it's charge rate is significantly LOWER that the what the higher capacity NiMh batteries require. I estimated that the charge time needs to be increased to about 28 hours due to the lower charge rate.I have not been very diligent to un-plug the charger after the required charging period, but still the battery pack lives on. (It's not even warm while charging).Sure, I could acquire a NiMh charger and get a more efficient charge, but so far, it has met my needs (Cordless Drill Battery). If you really need a quick charge then I would recommend investing a NiMh charger. The NimH chargers have special circuitry to determine when the charge is complete and shut off the charger.As for potential danger... I can understand concern here - we've all heard stories about laptop batteries causing fires. You certainly don't want to burn down your house on any project, but since the battery and charger don't even get warm, I must assume that nothing is being stressed beyond normal use. I would be cautious and monitor the first attempt at charging - and always keep the charger away from flammables - perhaps in the middle of a concrete floor.Or... If you want... you can pay top dollar and get a new lousy NiCad battery pack (Cordless Drill Battery) - or discard the whole thing and buy a shiny new one, but you wouldn't need an instructable for that! )
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Beginning with one battery we can change our future

In November 2005, SANYO( SONY Laptop Batteries) released the "eneloop" rechargeable battery which can be reused 1,000 times. Batteries are a silent force behind our convenient and affluent lifestyle. When we look around, there are innumerable items that are powered by batteries, such as remote controls, cameras, toys, and lighting equipment.(Cordless Drill Battery)

Because batteries are being used in such large numbers, we want people to use batteries "Over and Over" in consideration of the global environment. SANYO, as it aims to become a "leading provider of Environment- and Energy-related products," promotes innovative manufacturing (Monozukuri) to bequeath a beautiful Earth to future generations. "eneloop" is one of the products in which SANYO's vision is embodied.

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