Can't trust the battery level indicator?

Has anybody had issues with an inaccurate battery level display? I’ve had a bunch of times now when my OP1 has been charging for hours (showing the charging animation on the LEDs) but then after a day of charging I’ll unplug the USB and hold the info button and the battery still only displays two LED’s. A few times it has shown full LEDs, and then within an hour is back down to two again. I’m a little paranoid about it and don’t like to push my OP1 to battery death, but should I do a full battery recalibration? AKA let it drain fully then charge from scratch?

That’s a common issue, the actual battery is fine, yes a recalibration will fix it (for a while)

Ie. Charge from empty while switched on for like 6 hrs?