creighto,
I know Li-ion batteries don't keep their capacity over time, but I assumed that socaladam had recently bought the SIIG 2400, and a newly bought unit shouldn't have lost such a large percentage of its capacity, unless the store that sold it have had it lying around for the past couple of years. In which case they should never have sold it, and I would have demanded my money back. I've heard somewhere that Li-ion batteries can loose up to 20% of their capacity per year, so the 2000 mAh capacity you mention doesn't seem unreasonable. But even so, 2000 mAh should give 14 hours of operation with a consumption of 100 mA. To get only 8 hours, you would have to be all the way down to ~1200 mAh, given the equation (lb / ld) x 0.7 is correct. If they're selling batteries with only 50% of the stated capacity, I'd call that a scam. But I'm no battery expert, so of course I could be wrong, and if he used an old unit he just had lying around, then it's a whole different story...
- caretu
I know Li-ion batteries don't keep their capacity over time, but I assumed that socaladam had recently bought the SIIG 2400, and a newly bought unit shouldn't have lost such a large percentage of its capacity, unless the store that sold it have had it lying around for the past couple of years. In which case they should never have sold it, and I would have demanded my money back. I've heard somewhere that Li-ion batteries can loose up to 20% of their capacity per year, so the 2000 mAh capacity you mention doesn't seem unreasonable. But even so, 2000 mAh should give 14 hours of operation with a consumption of 100 mA. To get only 8 hours, you would have to be all the way down to ~1200 mAh, given the equation (lb / ld) x 0.7 is correct. If they're selling batteries with only 50% of the stated capacity, I'd call that a scam. But I'm no battery expert, so of course I could be wrong, and if he used an old unit he just had lying around, then it's a whole different story...
- caretu