I have some similar Li-ion AA batteries for my Blink cameras. They work very well since the Blinks hate ni-mh batteries. Interestingly, these behave oddly in my

I have some similar Li-ion AA batteries for my Blink cameras. They work very well since the Blinks hate ni-mh batteries. Interestingly, these behave oddly in my camera speedlite. They can't seem to charge the flash, and the LCD flickers while on. My best guess is the charging the flash capacitor pulls more juice than the lithium batteries can handle. Thankfully, ni-mh work great. For your Ni-mh that stop working, if they won't charge you can sort of jump start them using a good battery and they'll charge again. Use some aluminum foil strips and touch the contacts between the batteries together for a few seconds. Positive to positive, negative to negative if I remember correctly.