I want to use couple of lithium batteries to heat up small bit of nichrome wire. But I have also read that if you are not using them properly they might even explode. Is it safe to use lithium batteries to heat up nichrome wire which is done under high load? So I want help from people who are expert in these kind of things. Could someone tell me about the safest way to use lithium batteries under a very high load? I would really appreciate an early response from you guys. Thanks.