Best Cordless Drill

August 22, 2009

Cordless Drill Batteries

Filed under: Cordless Drills — bestcordlessdrill @ 3:39 pm

How do you choose the best cordless drill battery?

The battery is, perhaps the most important part of a cordless drill.  When it runs out of juice, the drill won’t work anymore.  The power it can deliver will determine how much power the drill itself has.  When the battery wears out, many times that’s the end of the drill.

For more information on the best cordless drills, including information on drill batteries, at the best cordless drill site.

There are three main types of drill baterries still in use.  There is the NiCD (Nickel Cadmium), NiMH (Nickel Metal Hydride), and Li-ion (Lithium Ion).  Those are in the order of oldest to newest.  You probably suspect that means they are in order of worst to best.  That’s not necessarily true, although li-ion is the “hands down” winner.  But NiCD and NiMH are mainly just different.

The advantage of NiCD batteries is that they don’t lose their charge much while sitting on the shelf.  NiMH batteries do, significantly.  In case you’re wondering, li-ion batteries lose very little charge while idle too.  How much do NiMH batteries lose.  About 30% the first month, then 20-25% each month after that.  That means that after 3 months of not using you’re drill the battery is almost dead.  After four months it’s completely dead.

But many people don’t let their drills sit for that long, so it’s not a problem.  Or you could just charge the drill again before you use it.  Besides the drainage problem, NiMH batteries are all-around a little better than NiCD.

What makes li-ion batteries better?  They can run through more duty cycles before wearing out.  They hold more charge per weight.  And they don’t lose much charge when idle.  So why not just li-ion batteries all of the time if they’re better.  For one, they’re more expensive.  NiMH batteries are also more mature technology which has some advantages.

For example, my favorite drill the Panasonic 18 which won the best 18v cordless drill award uses a NiMH battery.  So don’t write them off.

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