The cost too tantalizing probably should attract more mistrust than trust. I received this battery in the announced deadlines and comply with the description. When I installed it on my phone to charge, I've been surprised that it does not turn back, even if a battery is not necessarily charged. After loading night, the result is the same: not the least energy comes out of this accumulator. Cheap bursting the purse said the ancients! I now expect reimbursement promised by Amazon.