DOT-01 NP-BX1 Battery Status

Back in February, a quartet of DOT-01 NP-BX1 lithium batteries for my Sony HDR-AS30V helmet camera had mediocre performance compared to an older Wasabi battery:

After eight months of regular use, they’re even further into mediocre:

In round numbers, they’re down from 2.8 W·h to 2.5 W·h and now run the camera for about 70 minutes, rather than 90+ when new. Our typical rides go for about an hour, which means I must swap batteries somewhere along the way.

I still dislike the notion of sticking a 16850 cell next to the camera and powering it from the USB charger running the M20 rear camera requires another helmet cable, but it’s obvious NP-BX1 batteries lack enough active ingredient for the long haul.