My Braun series 1 150s-1 has failed to turn on after a recharge. I recently had the exact same issue and I sent it away to be fixed. When it was returned to me by an authorized service repair expert, it started to work again at a full charge. When the battery ran out, I recharged it using the plug in charger that came with the unit when I bought it. Upon recharging, I tried using it again and it did not turn on. This is the second time this has happened. What can I do about it.