There's billions being invested in battery technology. We keep seeing break-throughs being announced, but during the 6 years I've been involved, no break-throughs have been realised; however, we do get a 10% to 20% improvement every year, so batteries are becoming smaller, lighter and more powerful for roughly the same cost. In the meantime, there'll be plenty of work for Insatinternational.
There's many difficult obstacles to overcome to be a commercial battery repairer, which is why there's not many around. Jimmy at Insat is very passionate about what he's doing and the associated technology, which might have something to do with his success. Maybe he'll get harvested by Apple or hoovered up by Dyson because People that know about this stuff are very much in demand, so get his services while you can.