9V (PP3 shape) re chargeable battery

[Paul Drawmer]

I have bought this:
https://smile.amazon.co.uk/gp/product/B089CRTDDY/r...

And part of the instructions has surprised me:
I have bought these partly for an item that has little use (remote control for a gas fire) and partly for a couple of projects that invole some small LED lighting strips which will have a fair amount of use.

I am surprised by the high 5400mWh capacity, especially as the battery housing include the charging electronics and a micro USB socket.

I'm not at all familiar with LiPo batteries, but the blurb says the best way to get the best out of them, is to carry out 3 charge/recharge cycles when they are new, and then put them into regular use. This sounds like NiCad advice to me; do LiPo batteries need this type of attention, or is the manufacturer just trying to get the users to do the post manufacture testing?

[steve-V8s]

Interesting terminology.

Your batteries are quoted in Watt Hours. Normally a battery is rated in Amp Hours which is a different thing altogether. The blurb states fast charge requires 2A which is rather a lot via a micro usb connector and more than most chargers will cope with.

[Paul Drawmer]

steve-V8s said:

Interesting terminology.

Your batteries are quoted in Watt Hours. Normally a battery is rated in Amp Hours which is a different thing altogether. The blurb states fast charge requires 2A which is rather a lot via a micro usb connector and more than most chargers will cope with.

Doh! 9V 600mAh then - thank you.

I had noticed the 2A charge rate, but as most of mine are 2.5A max They do charge OK. I have a big powerbank which is the best output, but it gets warm in the process.

[dapprman]

Sounds like the internal electronics prevent the battery from being flat lined and also do a conditioning charge, which is quite cool in design. Just don't them with a hammer or drop something heavy on them.

[rxe]

The mWh thing started with the 1.5 volt cells, where multiplying your mAh by voltage yielded a plausible capacity figure that suggest these were excellent cells - when in reality they were distinctly average.

I can recommend the regular EBL li-ion cells - no USB port, 8.4 volts and 800 mAh. I’ve got a load of them in my security PIR sensors, they last as well as alkaline….