i need a very powerful battery (4000mah 10V or higher) and don't want to spend more then $30 please help! [answered]
oh, and the size of it has to fit in a 6V lantern. thats why lead acids bit the dust and (so far what i know) lithium polymer batteries bit the dust because they are way to expensive.
with a 35W power consumption, its hard to find a power source that will fit in a 6V lantern, a affordable price (under $30) and powerful enough to power the load for more than an hour. (some calculations i did show i need at least 3500mah for 1 hour of usage )
but i think i might have a solution a 2 laptop batteries from amazon wired in parallel after they have been took apart.
a drill battery doesn't even come close to the amount of i need and they suffer from memory effect and just plain out isn't near powerful enough (1.5 AH per cell)
OR my second choice is to get many rechargeable AAA batteries and wire them to give 14.4V
(BUT HOW DO I SOLDER THEM WITHOUT THE TABS? and what kind of array should i use? [68 AAA])