I have bought something like a dozen AM batteries over the past two years. About half of them I've gotten refunds because of early problems. The other half seemed okay for the first few flights but then show problems. I have four on my shelf right now and don't trust any of them over 12 mins of flight. Problems include:|
Mid-flight shut off without warning
mAh less than advertised
Maximum possible mAh decreases dramatically after a few flights
mAh misrepresented in the firmware
Reported mAh moves up and down during flight
Reported power of battery vanishes after shut off (e.g. land with 59%, turn battery off, turn battery on, battery suddenly has only 17%).
AC auto lands at 27% without warning
AC mAh falls like a stone starting at 24%, 2% at a time, without warning and AC lands in less than a minute with 7%.
Lamps are too dim
Lamps don't flash / blink correctly
Button doesn't audibly click (mushy)
Battery is too tight in the compartment and won't come out without several minutes of great effort
In contrast, the DJI batteries have always been rock solid in every way.
There are only two AM batteries I trust: Limewire & Venom. They were great batteries. But I can't find them anywhere anymore. I've tried others and there are always problems. So I've given up. I don't buy AM batteries anymore. It's genuine DJI for me moving forward until a reputable AM manufacturer steps in and builds a good reputation and good reviews.
Re extra mAh, IMO, the best thing to do for extra mAh is to mod a genuine DJI battery with externals.
Hope this helps.