mareklew
lvl.2
Flight distance : 4026 ft
Germany
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Cameleon Posted at 12-19 06:32
Not sure that is true about trickle charging for LiPo batteries which the OP uses. My understanding is you shouldn't trickle charge them. I think the manual states a minimum power of 1A charger to be used with a max of 2A that the OP can pull. If you hook it up to a 3.1/4A charger it will still work and should have no detrimental effect as the OP will limit the current it takes for the battery.
Let's not mix things up, trickle charge is a completely different story. Trickle charge is when you run some small charge current through an already full battery, all the time. This is something simple charging circuits would do either to keep the battery topped (trickle current would be selected at a smidge over the self-discharge current) or to even avoid charge controller at all (since NiCd/NiMH cells could dissipate so called 10h-current as heat without taking too much damage).
What we talk here about is charging the LiPO at its optimum CC-CV regime (constant current up to nominal voltage, then constant voltage) by the on-board battery manager, but reducing the initial charging current by limiting the power input. The on-board charger in modern devices is usually trimmed to provide fastest safe recharge, not necessarily best battery lifetime. By throttling it, you usually extend LiPO/LiION battery life, but never shorten it. Remember, the camera charge circuit cuts the charge off, not the wall charger.
I work in the R&D of hybrid/electric vehicles, they do run on Lithium batteries and since these batteries cost in the range of $10k, we do our best to keep them happy...
btw: There are devices that will reject USB chargers that cannot provide some minimum current, but USB spec says the basic USB socket provides 500mA and that's it, chargers can do more, but the device shall be happy with 500mA too. If not, its not really compliant...
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