This battery does not work for a Pentax WG3 I rebooted it directly into the device via the USB socket and my computer, the light flashes well until the end of charging. Once recharged impossible to turn on my device! this happened to me during a visit to a water cave, luckily I had the original battery in my waterproof case. to avoid this type of device. despite reimbursements I would be in my pocket for the cost of return and moffrir the charger and the battery "Pentax".