There are a few causes for a battery not holding a charge. First off, as a battery gets older and older, the ability for the battery to hold a charge decreases over time, causing it to gradually shorten in battery life. Secondly, if the battery simply will not charge after first receiving the Sonim device, more than likely it is faulty and can be replaced with Sonim’s 1-year accessory warranty.
If you need any further assistance with this question, please contact the Sonim Customer Experience Center at 1-833-MY-SONIM (1-833-697-6646) or email us at [email protected]. We are open 24 hours a day, Monday-Friday and we will further assist in troubleshooting.