I use a silicon carbon battery on my phone. 7k mha is crazy good for my needs, it's +40% from a 5k. But for anyone planning on buying them know that the higher the capacity for size the worse their life span should be in theory, since the difference is just the silicon to graphite ratio. More silicon = more capacity but worse life span and more graphite = longer life span but lower capacity. So just because a battery is silicon carbon doesn't tell much about how long it will last, since you can have a SC battery with 5k and 10k mha that would have completely different results.