Quote:
Originally Posted by Markulous
Li-ion, which are what're used predominantly in camera battery packs, have in-built charge level detection and will 'switch off' the charger (turn light green and prevent further charging). This is to prevent overcharging (for which there's a safety issue). I have never seen evidence to suggest it was better or worse to leave a battery 'on charge' for long periods of time
They can be charged from any charge state as they don't suffer 'memory effect' but do not like being totally discharged (again, in-built protection against this) which is why they're supplied half-charged (they also retain their charge if not used, unlike NiMH). However, they have a limited life, whether used or not (2-3 years) from date of manufacture
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Excellent Markulous, yes I did some early tests with my Canon 350D charger and Li-ion batteries and connected the charger and Li-ion battery to a test rig I had made. You will notice that there are positive + , negative - and T terminals .The T terminal is the reference voltage sensing for folding back the charge which normally starts off at about 510ma and slowly drops to about 250ma until the battery is so called fully charged and then the charge drops to zero.
So there is no benefit or detriment to leave the battery connected once the Amber led has changed to Green. I hope this helps.
Brian