Some of the cool DIY projects using old or dead batteries below will have you not just handling but also opening up batteries. Ensure you do the following while going about it: 1. Wear gloves and a mask: Chemicals found in batteries are toxic, and when you're working with old and dead batteries, there's always a. With global warming threatening the extinction of entire species, the least you could do for Mother Nature is switch to sustainable energy. An easy and affordable way to do this is by making your solar power generator. A DIY portable lighting system won't just put your old batteries to good use – it'll also come in handy during power blackouts and overnight. Looking for a cool and fun way to spend an afternoon with your tech-curious nephew or niece? If yes, you'll love this cool DIY project using old. A portable mini fan doesn't just look cool, it also keeps you cool, and it's a surprisingly easy DIY project using old or dead batteries. Here's a list of what you'll require: 1. 9V old or.