The battery change took just 10 minutes thanks to good and stable work stuff and a perfect guide, it was no problem to replace the battery. The iPhone runs again without crashes or battery failure. The old battery had always off uncontrollably at times 50% times at about 20% and that was it. After about 1 hour you could the device then on again. After the next WhatsApp message ended up being mostly wiedre end and the iPhone was out again. Now the unit is running stable again and without failures. The battery discharges clean to 0% down and keeps my feeling for almost as long as the original battery from Apple (these costs allerdinsg to 80).
All are technically adept and not unbendingt have two left hands, the battery can also easily switch. Otherwise, the seller even offers that you can send in his device with problems and then the battery exchange of experts is performed. But I think that accumulates a small charge here, if I remember correctly. For the Invested 24.95 I would not hesitate to regain access to this kit and replace the battery pack.