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Technology / Re: Can 40 x 2500mAh AA batteries replace one 100Ah lead acid battery?
« on: 24/04/2014 08:47:16 »
Beware of assembling large stacks of cells that aren't designed for such assembly! You can get away with 10 x AA NiMH cells in series because in the event of one failing open-circuit the voltage across it will only be 10.8V. But if you put 40 cells in parallel and one fails short-circuit, the prospective fault current through the dud cell is several hundred amps and more than likely to burn a hole in your boat.
Face it, lead-acid batteries are crude, oldfashioned, heavy, but extremely robust, tolerant and reliable for high current demand. There's a good reason why they are the only approved technology for most small planes, and judging from the problems Boeing are having with Dreamliner batteries, I'd rather have a PbAc in a boat than anything else right now.
Face it, lead-acid batteries are crude, oldfashioned, heavy, but extremely robust, tolerant and reliable for high current demand. There's a good reason why they are the only approved technology for most small planes, and judging from the problems Boeing are having with Dreamliner batteries, I'd rather have a PbAc in a boat than anything else right now.
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