This might be a silly question, but here I go. My son’s power wheels car battery (12v 9.5Ah lead acid) is gone and, here in Venezuela, they are pretty difficult to find, not to mention the high prices. So looking for an alternative I found that a local computer store have those laptop battery packs on sale (10.8Vdc 2600mAh/28.08Wh Li-Ion) they also sell external chargers for this battery pack, and I started to wonder if I can build a battery pack that works properly on the power wheels. I been reading about, it takes more than basic knowledge on batteries to do that, so I decided to post this question.
Is it possible to make an arrangement of these batteries to power this type of car?
I know that these type of batteries needs circuitry to prevent overcharge (over 4,2v), prevent over discharge (below 2,5v), charge balancing, and prevent over current (more amps than they support during discharge). What my limited knowledge (mixed craziness) tell me to do is, buy 4 battery packs, 4 chargers (that will solve over charge and charge balancing problems), and use them in parallel to power the car (10.8Vdc 10400mAh 112.32Wh), I suppose I’ll need some circuitry to prevent over discharge, and I don’t know if I need something to limit current since 10.4Ah are over original battery 9.5Ah.
And yes, crazy as it sounds, I can buy 4 laptop batteries plus chargers by half the price of original power wheels battery.
Thanks in advance for your help, and sorry for my English.