Cardo vs Sena

[Liteitup]

My PTBold has died early on two rides, Friday being the most recent. This after what I assume is a full charge. Both times I used my jump box to recharge it while we were stopped. Showed a full charge, or more accurately, quit taking a charge after less than thirty minutes and worked fine the rest of the ride. I've never had it notify me of low battery, it just quits working.
Most times it works perfectly.
User error or ......?