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I take apart (willingly) a trashy 9V Nickel Metal Hydride rechargeable battery, branded GodP, and find seven poor quality cylindrical cells wired in series.
Then I take apart (reluctantly) a high quality Vapex 9V NiMH battery and find 7 prismatic (or cuboid) cells which properly fill the space inside the plastic case.
I take apart (willingly) a trashy 9V Nickel Metal Hydride rechargeable battery, branded GodP, and find seven poor quality cylindrical cells wired in series.
Then I take apart (reluctantly) a high quality Vapex 9V NiMH battery and find 7 prismatic (or cuboid) cells which properly fill the space inside the plastic case.
I remember buying 10 rechargeable 9v batteries from China. They were supposed to be pit in smoke detectors and various tools. It only took 1 week before the first battery fell apart. It literally fell apart as I was about to recharge it. I'm only using Varta these days, that's quality for cheap.
I've also come across 9V NiMH cells that have 7 AAAA cells in series, that was from the Uniross brand.
Great video thank you so I'm best off staying with my pro cell 9 volts as non of the rechargeable 9 volts are actually a full 9 volt as they are 7 cells at 1.2 volts same with most lithium ion "9 volt" are over voltage or under voltage and like you said create noise in audio equipment in say a bass guitar preamp
Thanks for saving me from opening up some by myself. I always wondered what is in them. Now I even wonder if opening them to extract some of the tiny cells might be worth it to power some tiny gadgets I'm planning to build.
3 x 3.2v?
Thanks for the video Have just purchased some 9v batteries from AliExpress and wondered why they were so light in weight. I'm just waiting for a rechargeable battery charger. Have you ever made at all? the brand i purchased is PALO 9V 6F22 Ni-MH for my Multimeters . Also I'm waiting on a ANENG 618C Digital Multimeter Smart Touch DC Analog Bar True RMS Auto Tester Professional Transistor Capacitor NCV Testers Meter await you testing one of these. Seem really great for a DIY person. Keep up the good work Ross Tga NZ
He forgot the battery capacities compared to the size.
Postal scale my ass, That's how we weighed our pot as kids!
It was very interesting to see the construction of the different NiMh 9 volt batteries and it was obvious why the cheap one performed so poorly. I don't like the idea of boosting a 3.7 v battery to 9v, seems like you would waste a significant amount of energy. What about 8 NiMh AA cells in a holder? You would get 9.6v nominal at 2000 mAh or so or if the voltage is too high just shunt one of the cell compartments.