KENTLI CHU4 USB Charger with 4 x 1.5v 3000mWh AA lithium li-polymer rechargeable battery for LED falshlight Digital camera Microphone (charger with 4PCS AA batteries)

Having purchased a blink XT camera setup I was getting fed up with constantly changing Energizer cells in my main camera which does trigger often.I prefer to use rechargeable batteries but regular 1.2v cells don't work, the Blink cameras need 1.5v cells.Googling found that the Kentli cells were the only affordable ones on the market. And while not cheap, after a few energizer swaps they don't seem so expensive.They arrived in a nice plastic carry case. The charger itself seems quite cheap, and has a very short USB lead attached.The 4 cells were in a state of partial discharge, good. Took about 1 hour for the charger to switch from red to green for each cell.Fitted two to my main blink camera and it booted up instantly.Only had the camera running with the Kentli cells for 5 days but they still show as good. Outside temperature has ranged from 7 degrees to minus 3 so they appear to cope well with temperature changes.I generally get 8 weeks out of energizers on the blink. Well short of the 2 years claim. I'm hopeful the kentli hold out well as they are 3.6v cells with a circuit to drop them down to 1.5v.I'll feedback on my review as the weeks go by.Today, 4th December the batteries in my well used driveway blink XT camera reported low. So that's roughly 4 weeks of fairly heavy outdoor use. Not glowing for Blink but pretty decent for the Kentli cells. I'll fit the other pair now and charge these ones. Worth noting outside temp for one whole week was very low. No higher than 2 degrees and often minus 3 degrees centigrade. So a fairly extreme test for the cells.

Quick, out of the box & first charge review:CONCEPT:This is a clever and neat solution to a problem. Whilst many devices happily run with rechargeable AAs that deliver a lower voltage than 1.5v, some don't. So these use a different, 3.7v cell instead of the typical 1.2v cell. They pair this with a tiny voltage regulator, all wrapped up in an AA form.There are two connections at the positive terminal, one used for charging the 3.7v cell and the other to deliver the regulated 1.5volts. As the cell's voltage drops, the output remains steady at 1.5v. Ingenious and a fair justification for a price premium.You'll need to take care to only use the supplied, battery-specific charger but, in use, the batteries seem to function as any other AA design.Immediately my remote flash triggers' basic charge indicator shows fully charged batteries (compared to Eneloops which always show as nearly depleted after a fresh charge). I imagine the battery's voltage regulator design will mean this will indicate full charge until it just plummets, but that'd be a minor issue so long as I keep on top of my charging routine.You can independently check the internal 3.7v cell's remaining power independently of the regulated output using a voltage meter on the outer, inset ring at the positive terminal.I'll use these in anger over time to test out self-discharge and typical use between charging cycles, but this looks very promising.BATTERIES:Work as any other AA in use.CHARGER:As others have pointed out, it's a bit on the cheap side. I'm not fussed about the perception of build quality measured in weight, and the fact it'll pack away small is only a benefit.But a strongly mounted USB-C charge socket as opposed to an encaptured and short USB cable would afford more flexibility and should last longer. And better springs at the negative terminals would be more reassuring. The charger indicates red for charging and green for charged. Kentli claim each channel is independent of the other so, feature-wise at least, it looks good.It'd be great to see the AAA version offered here as I suspect this will resolve issues with several other devices that don't get on so well with 1.2v rechargeables. If they could do the same double-connection trick with a PP3 too, that'd be great.The English translation doesn't seem to do service to what these batteries represent but, if they last and deliver on their promise, these will be a big thing.

If you controlers are eating batteries these are what you wantI was having to change battries every 6 hours but these last for 30 hours at a constant voltage.So they could be called Green as the energy put in the charge last a lot longer.Perfect for VRFIVE STARS

The batteries are awesome! I can't believe the power these provide, on a consistent basis. I use these for an ATN X-Sight 2 which chew through normal AA batteries in minutes. These last HOURS in the device.Four stars instead of 5 because the battery charger is a bit cheap and tatty with bent springs and one battery never seems to reach full charge but I can't send them back because I use them too regularly.Overall, very happy and very impressed!!

Disappointed with the batteries, all 4 do charge but they are not consistent in their output. I use them for night vision which is high power drain and was recommended this make of battery as great value for money but for me they are not so great value. Shame, trying to decide to return or not because they are borderline acceptable.

I like the idea of lithium rechargeable batteries. But these batteries are to bloomin expensive. More batteries are more than the original order with. Charger and harder to get hold of.UpdateI have purchased more batteries the four that came with this are now no longer carrying a charge. Half the twelve additional batteries I bought are also defective. This was a massive waste of money!

I bought these to replace the batteries in my VR hand controllers. They expect 1.5v and putting in standard rechargebles means the controllers are always detecting the voltage as low and sometimes switching off mid game. Bear in mind the charger will only charge these types of battery and not standard rechargebles. Very clever how they have done it too. Might seem expensive but they are the best I've ever used and I have tried loads.