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Author Topic: Correctly Charging Lithium, NiMh, LeadAcid - REMIND US !!!  (Read 1902 times)
Ben55
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« on: August 15, 2012, 08:46:57 PM »

Many people must be confused by now....

So many types of battery, in many sizes.  I have some simple rules, from reading stuff;  but they may need modifying !!

Constructive recommendations invited.

Lead Acid (in car) - needs  to be kept charged. Hates to be empty for long.

NickelMetalHydride,  NiMH -  best to discharge before charging. Some chargers do this automatically.
Otherwise it remembers the wrong level for "empty" and capacity reduced.

Lithium Ion (on my bike) - needs  to be kept charged. Hates being left empty for long.

NickelCadmium , NiCd - best thrown away,  LOL





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marcus
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« Reply #1 on: August 16, 2012, 08:02:53 PM »

I thought Liion didn't care what state of charge they're left in - but they REALLY (i.e. terminally) don't like it if you overcharge or overdischarge them, so really need a battery management system.

m
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Ben55
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« Reply #2 on: September 30, 2012, 07:41:39 AM »

Lithium-Ion  I understand is far better than NiMH at holding its charge.

I have found it excellent on my electric bike, and also on  Bosch drill.

But they do recommend recharging as soon as possible, and not to leave them  in discharged state.

Any experts out there ? Comments welcome Smiley

 
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PaulOckenden
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« Reply #3 on: September 30, 2012, 09:11:06 AM »

I don't think there is a general rule for lithium based batteries. There are so many different chemistries/constructions out there, and they all have different characteristics.

Some (e.g. early laptop batteries) like occasional deep discharge/charge cycles. Others (more recent laptop batteries) are happier with lots of little top-ups.

P.
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clockmanFR
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« Reply #4 on: September 30, 2012, 11:18:16 AM »

Me I am just leadacid.

But then there are over 20 different types of lead acid. (Its Sunday morning so brain not fully operational).
From Gel which has acid felt pads between the plates, and likes a gentle float charge rate, up to wet acid traction types that take a stonking charge.  
« Last Edit: September 30, 2012, 11:20:39 AM by clockmanFR » Logged

Everything is possible, just give me TIME.
supremetwo
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« Reply #5 on: September 30, 2012, 12:55:15 PM »

Comprehensive info is here:-

http://batteryuniversity.com
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