(01-15-2016, 07:34 AM)paulieg Wrote: I am a big fan of ebay. However, there are a few things that are not worth buying as ebay noname wonders. Batteries are one of them (for demanding applications). The ones you linked do not list ratings and, even if they did, I would not believe them. Very few li-ion batteries are rated to the specs required to run them in your proposed configuration, the defunct Sony ones for example, and these are nowhere near them. It's not a technology that's easy to knock off.
-p
the reason i picked these specific batteries is because i have also visited their website (although there is some misprint on it) i have also been using these batteries like i said, for quite some time now for charging my tablet and phone on the go.
what do you mean by ratings? do you mean discharge of amperage? when you are place 3 or 4 of these in parallel that increases the output amperage. when you are dealing with battery discharge, especially this kind, using the other parts i have listed there, the output rating isn't truly necessary. but if you want to know what the output of the green one's i have in my hand are, let me grab my multimeter really quick and tell you.
3.64v 3.12a 2600mah
although now they have them both on their site listed as 3000mah batteries pink and green, so the one's that are being sold now are probably a earlier batch.
i understand your misgivings into buying a brand you don't know, but it's not necessary that you said this, that's fine if you don't want to buy these specific batteries, this was an example of how to build a very high mah battery for pretty cheap. the reason i say cheap is because you can find cheaper batteries out there that are the 18650's to use, considering that you can always swap them out like some aa size batteries in other electronics and charge them later with a wall charger, or when you get home or near a wall outlet, you can use the other part here i listed that has the input power to charge up all of those batteries using a different outlet to still use the pine64 on while the batteries charge.
these batteries can also be used in the other 18650 battery holders that they have on ebay or amazon, or wherever for that matter, and use them to charge your cell phone, or whatever. instead of having one battery that is only for your pine64, it can then be used in other applications, mitigating the cost some so it can be multipurpose.
that's all i was saying to begin with.
EDIT: the reason they are low on voltage atm, is because i have been using them and they are not fully charged right now, i was using them in another project i have going for something else running a pump and some fans off of two of them through a 5v regulator drawing like .6 amps for a little while. the part that has the led on it, that is basically the voltage and amperage regulation portion. it will step the voltage up to 5v and keep the amperage at a nice even 2.1 amps output through the usb cable into the pine64. the batteries you can buy anywhere. i just showed you the batteries i bought.
