Discharge protection element/board, where to buy it?

[postcd]

Hi,

i have pocket size solar panel and mobile phone (and other devices like powerbank) that i would like to be charged. But i need to ask for advice on some element between panel and these devices that will:

- prevent discharging (an ideally also overcharging) of the device connected to it?

i know there are like $20 devices made for this purpose (https://www.aliexpress.com/category/...ntrollers.html), but my panel is small and i also want some tiny, budget element (board) that will do the job and loose as low power as possible.

I would greatly appreciate if you can recommend me a product sold at http://aliexpress.com/ (i am shopping there and have account there) or http://www.ebay.com (free worldwide shipping)

I do not know what to look for and what is the best option to achieve what i described. I was adviced Schottky diode: https://duckduckgo.com/?q=schottky+diode&t=ffab&ia=web

And indeed it is sold there: https://www.aliexpress.com/wholesale...=n&groupsort=1

There are even some "boards" (https://www.aliexpress.com/wholesale...arge+discharge), unsure how to determine which volts/ampers i should be looking for (how can i meter that using multimeter?) and if this is what i can use for the purpose?

My panel is described as: 5V, 200mA output

Thank You,
V.

[PNjunction]

No need to go to aliexpress at all.

i have pocket size solar panel and mobile phone (and other devices like powerbank) that i would like to be charged. But i need to ask for advice on some element between panel and these devices that will:

- prevent discharging (an ideally also overcharging) of the device connected to it?

Already in both categories of devices.

i know there are like $20 devices made for this purpose <snip> but my panel is small and i also want some tiny, budget element (board) that will do the job and loose as low power as possible.

Your 200ma panel is too low in power for most of the phones or banks to accept. At least for startup.

Actually, by the time you piece this all together, you could have easily bought a commercial commodity "folding panel" with usb output to accomplish the same. No need for a bench hack to accomplish this.