Inside a Vapex 8-way fast charger. (NiMh) 

Don't be so hard on those sellers. Of course it has auto thermal shut off, just probably at a little more elevated temperature than you would like. Like when the circuit board bursts into flames, I'm sure it will stop charging...eventually... .

It's good that NiMH batteries can just sit on charge forever, it's exactly what my house phones do, and makes me feel slightly less bad about leaving one of my cheapo electric drills on charge for two weeks in the garage.

Over the years, my physical condition has deteriated to such an extent that my workshop is now a store room with boxes of old computer parts and such. I still play with electronics, and watch your video's as they are released, when they do not come fast enough, I watch your older videos. So when you are talking of plugging the wrong power supply into a device, it reminded me of my last tragic error. I was trying to get an old external DVD device to work, it has been in the piles of crap in the back room for a couple of years. When it did not respond to the USB on my laptop, which is now my primary computer because of my condition, I decided to use the 5 volt power jack on the back of the device to add power in case the problem was low power on my USB plug. So I reached down beside my chair into a pile of electronics that now covers the floor on one side of my chair, and found a 2.1mm plug that I thought was 5 volts, and plugged it into the DVD device. My laptop (not even 1 year of age, ah such a young device) shut down in a flash. This, of course worried me a bit, so I removed that plug, and traced it back to a 12 volt wall wart! When I restarted my laptop I was very happy to find that it came back with what appeared to be no effect, that is until I tried to use either of the USB ports on that side of the machine! While they still gave out 5 volts, the data bus was dead, and they now serve only as charging ports. Thankfully there is still one USB 3 port on the other side of the laptop that was not effected. Still, stupid mistake that I shall suffer for till my next laptop purchase, and to tell the truth, it SUCKS, I was always using at least 2 if not all 3 of the ports for different jobs. Ah well shit happens I guess. Thanks a million for the great videos!

I've been watching too many Scott Manley videos. Every time Clive says "Delta-V" my brain insists he's talking about rocketry.

The 80F0308AD32 is an 8032 MCU. The letters and numbers in between denote the precise model from the manufacturer. F probably means flash memory instead of OTP which is often denoted with a C. The 0308 may be 3k ram 8k flash.

I just got one of these Vapex chargers (VTE8000). I have been having a small problem with it that I have just been investigating.

Nice placement of the inductor :-). The hardware designer probably measured the distance of the inductor to the transistor in the datasheet on a 27" inch screen and then decided to place it on the other side of the pcb.

The pulsing you are seeing is the delta V test, yes. Switch off the charge, connect to load (possibly the through hole resistors) and measure the voltage.

Clive I'm off my game today and a bit sick.

I have had the same problem of different chargers/power supplies with the same plugs...I solved the problem by putting a bit of heat shrink on each of the plug ends to warn myself.

You are correct that the cell resistance goes up at the end of charge, but it is called negative delta-V charge termination because the V that is measured by the delta V chargers is not charge voltage but cell output voltage.

The processor was produced by ABOV Semiconductor and has been discontinued. It had 8K bytes of FLASH, 512 bytes of RAM, 8/16-bit timer/counter, watchdog timer, 10-bit A/D converter, 8-bit Serial Input/Output, UART, buzzer driving port, 10-bit PWM output and on-chip oscillator and clock circuitry. It also has ONP, noise filter, PFD for improving

I bet you could make a back light for your old charger! there's a quick video idea for you - go on, give it a go

I use two of these to charge the batteries for my backpack sound system!

I've got one of these, I messaged you asking why it seems to make a ticket noise when it charges and you got back to me. It's good to see you doing a video about it :)

Bought one of these earlier in the year and I'm very happy with it, as I am with the chocolate witch I picked up today.

Thanks for this review. I just bought one of those last month, so it's reassuring to know its a decent charger.

Hi Clive, like you I have one of these which has worked flawlessly since purchase. But always reassuring to have your take on it . Many thanks for sharing, kindest regards from Bonnie West do Scotland. Joe.

I can stop watching this channel. Awesome!

The idea behind -dV-Turnoff is this: