These 1.2V batteries are discharged arrivals (measured to the meter), a quick phone charger and I put in my 2 phone Siemens C610 room, no worries detected after 2 weeks of usageon see if they take more than Chinese original batteries (2 years), the other 2 are placed in a weighing scale. I would stay here to confirm or deny their behavior over time. >>> Update after 8 months: 2 of 4 batteries are down, you can not recharge it either in my phone or dedicated charger ... I will test the famous eneloop instead.