Strengths:
- Small battery that comes straight line up to the batteries behind your controller
- Excellent battery life of approximately 30 hours depending on use (vibrations activated or not handle)
- Ability to charge the battery on your xbox one while continuing to play!
- USB charging cable relatively long (2.60 meters) and good (an indicator light tells you about the evolution of your battery)
Weakness:
- This criticism is not about the product itself but Microsoft policy that sells EUR 400 console with 2 non-rechargeable disposable batteries that do not take a week ... This product should be directly included in the basic pack!
For just twenty euros I highly recommend this quality product that will change your life!