MG
The Classic Marque

Guy, you're probably right about the gimmick but it is fairly robustly made.

I've never tested it out fully, recharging from flat. I just consider it to be like a range-extender.

C

I haven't seen the ones with solar panels. I suppose if you're walking all day in the sun and hang it on your backpack it'll charge itself a bit.

Guy, I think the reliability is pot luck. We've had two, the first not lasting very long. I'd get a cheaper one with reasonable capacity.

Thanks for those replies. It clarifies a bit. Clears the fog, as it were.

Colin, I had seen those power banks with an integral solar panel but took them to be more of a gimmick than a real useable device. I suppose one with fold out panels might produce a bit more power but one the size of a phone screen isn't going to do much in a UK climate.

With small solar panel. Variable re...

IF he was a gentleman he would stand aside and give Angela his/her chair ---lol---she'll get there, just a matter of when-

A power bank has internal electronics to manage its output. In order to continue charging (your phone, say) the bank's output voltage is adjusted such that it will always be above tbe terminal voltage of the device being charged. Even when it hasn't much capacity left, it is still capable of charging.

I was given one as a birthday present a couple of years ago. I use it all the time, very handy if away from home for a couple of days, especially if camping.

2500mA/H but it also has fold-out solar panels which make it a bit bulky but it does help to extend the charge.

There is also a smaller one in an electrically heated gilet my son gave me, so that's a back-up. I don't wear the ja...

Thanks Jud 👍

I know you weren't. I just added that for completeness.

Yes, you can run the powerbank flat. If your phone is on, it will consume power. If it's connected to a powerbank, it'll continue to draw power from the bank, until the bank is flat.

Even if the phone is off, it gradually runs down. So if it's connected to a bank, eventually, it would run the bank flat.

Well, I'm trying to send you a thumbs-up gizmo but don't seem to have the technical know-how to do it. Please consider yourself having received a thumbs-up.

Jud

Umm ?
I wasnt thinking of charging it from the phone. It's as a back up power source to add power to the phone when its battery has run low. But can one extract all of the power from it, or does it stop transferring when the power level in both devices becomes the same?