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08-12-2008, 10:08 PM   #1
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Do sanyo eneloops need to be completely discharged?

Does anyone know if eneloops have memory and need to be completely discharged?

08-12-2008, 10:13 PM   #2
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No. Ni-Cd is prone to the memory effect. Ni-MH & Li-ion are not.
08-13-2008, 06:46 AM   #3
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QuoteOriginally posted by dosdan Quote
No. Ni-Cd is prone to the memory effect. Ni-MH & Li-ion are not.
In fact, the Ni-Cd memory effect is mostly a myth - It can be seen in a strictly controlled lab environment, but not in the real world.

The problem is that many Ni-Cd chargers use timer-based charge termination - So if the battery is not fully discharged the charger will overcharge it, damaging the battery. This gets misinterpreted by many as "memory".

NiMHs almost require proper charge termination because it's a lot easier to damage them by overcharging, so nearly all chargers use temperature or negative delta-V detection.

Li-Ions are even more finicky about overcharging (BOOM), so all are charged using smart chargers that won't overcharge them.

I strongly reccommend getting a GOOD charger (a MaHa or LaCrosse are your best bets) for your NiMHs. At the very least you need one with independent charging channels.
08-13-2008, 06:48 AM   #4
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QuoteOriginally posted by Entropy Quote
Li-Ions are even more finicky about overcharging (BOOM), so all are charged using smart chargers that won't overcharge them.

That made me laugh! And I'm at work

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