Power Banks, techical question
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fossyant
Ride It Like You Stole It!
- Location
- South Manchester
Battery pack. Anker are a good make for power packs
nickyboy
Norven Mankey
- Location
- You want hills? We got hills
You do know that practically all power banks are made in China don't you?
ColinJ
Puzzle game procrastinator!
- Location
- Todmorden - Yorks/Lancs border
And practically everything else!
It makes me laugh when people go on about 'Chinese rubbish' but are probably posting from a Chinese-manufactured phone/tablet/computer...
Heltor Chasca
Out-riding the Black Dog
Just checked both my PBs. They have been fantastic. One from U.K. one from USA.*
*Both made in China.
*Both made in China.
nickyboy
Norven Mankey
- Location
- You want hills? We got hills
I've got a 13000mAh brute that I bought in China. It's done hundreds of recharges. Maybe they keep the good ones for themselves?
It's called a "Yoobao Thunder" which makes it even better
View: https://www.youtube.com/watch?v=veFwl94zRpk
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Levo-Lon
Guru
Yes but a lot are made without a standard ,bike light battery packs etc
mjr
Comfy armchair to one person & a plank to the next
- Location
- mostly Norfolk, sometimes Somerset
[QUOTE 5412682, member: 9609"]When I test the fully charged power bank with a volt meter, I will get 5.08v unloaded, but if I test it with a light bulb (that has a draw of 0.3 amps) the voltage falls to 4.54v. I'm guessing this is too low a voltage for the camera.
Does this indicate the battery has died or some other problem? or was this sort of power bank never intended to power a device such as a camera?[/QUOTE]
I'm not great with hardware but it sounds to me like the power bank isn't regulated well enough to power the camera. To check, you'd probably need to put something like a "USB Doctor" between the powerbank and camera to see how low the voltage drops when the camera's connected. IIRC, USB should be between 4.4 and 5.25 volts, but I think when I tested a power pack that put out 1A at 4.5V, it measured about 5.7V with only the USB Doctor's 0.1A load, which is a long way out of spec the other way, but it makes me think yours starting at 5.08V unloaded probably drops too far below spec.
To figure out whether it's died absolutely, you'd need to see how many hours it powers the 300mA light bulb for and compare that to the claimed mAh. I usually reckon on losing at least a quarter to the circuitry between the 3.7v battery and the 5v output on most full-featured packs (charge indicators, regulation, and so on).
Does this indicate the battery has died or some other problem? or was this sort of power bank never intended to power a device such as a camera?[/QUOTE]
I'm not great with hardware but it sounds to me like the power bank isn't regulated well enough to power the camera. To check, you'd probably need to put something like a "USB Doctor" between the powerbank and camera to see how low the voltage drops when the camera's connected. IIRC, USB should be between 4.4 and 5.25 volts, but I think when I tested a power pack that put out 1A at 4.5V, it measured about 5.7V with only the USB Doctor's 0.1A load, which is a long way out of spec the other way, but it makes me think yours starting at 5.08V unloaded probably drops too far below spec.
To figure out whether it's died absolutely, you'd need to see how many hours it powers the 300mA light bulb for and compare that to the claimed mAh. I usually reckon on losing at least a quarter to the circuitry between the 3.7v battery and the 5v output on most full-featured packs (charge indicators, regulation, and so on).
Shut Up Legs
Down Under Member
For my France cycling trip this year and also last year's Italy/France trip, I used this:
https://www.cygnett.com/products/chargeup-ultra-20-000mah-portable-power-bank-black
It's a 20,000mAh charger with 2 output sockets, and has been very reliable.
https://www.cygnett.com/products/chargeup-ultra-20-000mah-portable-power-bank-black
It's a 20,000mAh charger with 2 output sockets, and has been very reliable.
