I read some post about rechargeable batteries.You can bring any battery that won't take a charge or is dead back to life with a welder, I've done it many times. Just go to youtube.com and type in Battery and welder scan down a ways and you see how it's done. I call it resurrection juice!
You can even zap AA,AAA with a car battery.
Hope this saves you some money.
PS it's better to attach little clips to the battery post instead of touching the actual welder tip to the lug, (no clean up). It's will make sense when you go to Youtube.