I snagged one of those too. For the price it’s hard to go wrong.
These are for sale with Vipon code: https://www.amazon.com/LED-Flashlight-Waterproof-Rechargeable-Flashlights/dp/B07PQ1QP6J
For $6.90, it's not bad for a host. I put a 20mm 7135*8 from MTN with guppydrv just to see how it handles heat and an SST 20 5000K. I think it can handle more than 3A as it heats up quickly. Here's the pill:
The driver is held in place by tightening decent wall thickness body tube against the head.
BLF A6 clip fits perfectly, although the stock clip is good.
800-900 lumens with this setup. I used a black Sharpie on the MCPCB retaining ring.
Negatives are that the battery is trash and USB charging is pathetic.
I'd like to find a tail without the USB port.
Try code 3678BX1X for the TENAVOLTS.
I just tried the amazon link using this code 3678BX1X plus checking the 30% off box and got a set for $11.89
Not sure why it would not work while I was using my work computer. I tried last night on my notebook at home and it appeared to work, but I didn’t pull the trigger yet. Now for $1 less, it’s time.
Thanks!
Done… again. 
Almost 13 with tax 
but still a good deal. I’ll find things that use AAs to stick these into. B’harni knows I go through enough of ’em.
Sux being in the UK.
I took the plunge again myself. Seems my game camera uses 8 batteries so…….ya know, I had no choice…….or something.
Be very careful sticking ’em in series, though. They’ll hold up 1.5V and then drop dead. Regular alkies would just start getting reverse-charged and leak, but pushing current the “wrong” way through one of these might be Very Bad for the critter.
They require 5V to be charged, so I doubt pushing 1.5V into them will do much, but I’m not gonna be the first one to try. 
NNNOOONnnoononono, nono. Reverse-charged.
Normally, current goes out, charging it is pushing the current back in.
Reverse-charging is when one gives up the ghost, and the other cells happily keep pushing current the wrong way through it.
Output cap, blocking diode, anything on the output of the buck regulator might end up frying unless the mfr took steps to keep that from happening.
Like you said, I’m not gonna be the one to try it. Let’s get Mikey…
The Tenavolts kit came today (Prime delivery van, how slick is that?). One of the 4 cells tested 0 volts out of the box. 
The others tested 1.54-1.55V. I thought, this one cell is probably toast, and if so I’m sending the whole thing back. But after charging fully (blue light turns off when done) I set the cell up in an old ITP C7 on high, and it’s been putting out good light for nearly an hour now, so I guess it’s going to be ok.
What’s interesting, though, is the way these cells act in a light that has step-down regulation. I put one in a Zebralight SC5W and it only put out about 200 or so lumens instead of the possible 500… and within 30 seconds it had stepped down to maybe 5-10 lumens. The flashlight didn’t know what to make of it. Not enough current, I guess.
Rex, from what I understand they hold 1.5V then go to 0 when the Lion is low. There is no gradual decline like a alkaline. It could mean there is some self discharge but who knows.
There is a protection circuit inside. If it trips, it cuts off voltage. Putting it back on the charger resets it, I believe.
These cells were not designed to deliver lots of current - going above 1.5A will cause the internal buck converter to overheat and shut down.
https://www.vipon.com/product/4492232-Moobibear-COB-LED-Work-Modes-Portable-amazon-coupons
This coupon seems to work for both models of this “work light”. The rechargeable USB one I was able to get out the door for 6.XX tax included. The AA version is even cheaper. I’ve found these type of work lights are pretty helpful when puttering around in the basement or when the lights go out.
Passing along in case someone else finds it helpful.
Nice … I paid $5.88 delivered to my front door with Prime. Looks like a great deal.
Review:
Many Thanks for the heads up.
Nice. I ordered both for $11 total. Thanks for sharing.
I hear ya. Product description states: “Integrated 3-in-1 safety chip: Extra charge, discharge and short circuit protection, no over-charge, damage to lithium core or extreme temperature,” but how that works in practice is anyone’s guess.
What do you guys think is the source of power in this rechargeable one? Two 18650 cells? Three 18650 cells? Something else?
If the ad is to be believed, its 6000mah. Its likely a pouch pack. if we are lucky its 2x18650. Given the thickness, I’m inclined to think its a pouch.