Does anyone have any experience of these?
https://www.amazon.co.uk/dp/B0821ZNWKW/ref=emc_b_5_i
Flippin' expensive but if they work, should knock spots off the standard rechargeables.
It's quite an outlay as they are intended or use in a night-time infra-red camera (Browning something or other) which requires 8 of them - 12 volts. I've seen reports which suggest that rechargeables are pretty much a waste of time because they only put out 9.6 volts and the camera won't respond if the voltage goes below 9v.
I've got some that are similar, but lower capacity.
They aren't regular AA rechargeables - they are lithium cells with a regulator in the end to bring the voltage down from 3.7 to 1.5 V.
You should charge them via the built in USB port.
The battery will give the full 1.5 V right up until the regulator decides the cell has run flat, at which point it will just turn off.
My Garmin went from 4 bars (out of 4) to shut down in about 300 metres, and it could have been quicker if I'd been actually watching at the critical moment.
What could be a problem is one of the 8 turning off before the other 7.
In general, rechargeable cells don't like having current forced through ("reverse charging"), and are damaged as a result. Whether this is an actual problem in this case will depend on whether the regulator shut off is sufficiently robust.
On the subject of Eneloops, my black ones have done quite a bit better than the white ones.
After about 4 years, the black are running at 2420 mAh according to my MH-C9000 charger; the white are at about 1650.