justflie wrote:Hey Dudley. I think you're supposed to charge it for longer before the first run. Not sure though, still waiting for mine to come in. Chris (Fraggboy) mentioned in his review that he got a longer battery life on the second run so you might find that it does the same thing. The battery might take a couple of charge/discharge cycles to get to peak performance. And by battery and I mean batteries plural as there are two!
That is a myth actually, when the battery is fully charged, it cannot hold any more charge. It accually takes 2 or 3 charge, discharging cycles before the battery runs at it's full capacity, even if you where to leave it 10 hours or longer, still the same results, so a long charge beforehand is a myth. Will always take a few charges and discharges before the battery reaches full capacity.
My Roomba, in the manual said 16 hours before use and will even go into a 16 hours cycle, but never did, was almost charged when I got it. and indicated fully charged in 1/2 an hour and no problems with it.
Anyway with any multimeter you can prove the first charge needing to be 3 or so times longer then normal, just measure the voltage, then do it again a few hours later, not difference.
If the battery went into a charge, discharge cycle you could understand a longer first charge, but they don't do this, so when the battery is fully charged, cannot hold any more.
I think very few manufactures actually recommend it nowadays.