making any thing a laptop battery is bad for your laptop. the battery has controlled voltages and moreover there are many positives and negatives in the battery. even if you make a alike one, it should be a lithium one, coz you need constant voltage and high current. so you must not mess up and experiment. i myself have a business of rebuilding the laptop batteries. if you have problems with your battery then I could rebuild yours too. my cost is $7.5 per cell and guarantee is 1 yr. but shipping is to the customer. so dont mess with your laptop when you have a cheap solution available!!