bella-headlight
Newly Enlightened
Paypal has refunded me in full.
Paypal has refunded me in full.
Great result, now what are you going to buy to replace it.
John.
Once the Soshine E3 shut down due to low battery i checked the usb power meter, It only showed 7750mah had been pulled from the power band, that has a capacity of 13600mah, that means only 57% of the power banks capacity is available with an 1amp load, that`s not very good.
thanks for the 1amp load test.
i had several v8 4 tomos for testing, great price , white, black
termination boltage on my current unit is like
slot1 4.19v
slot2 4.18v
slot3 4.22v
slot4 4.21v
measured removed from tray, with ut61e
tomo technical details were reviewed years ago, for example on a blog. i like the concept of exchangeable 18650's. but the technology inside is outdated, of course. there are now a bunch of QC3.0, Qualcomm's QuickCharge v3.0 technology, enabled powerbanks on the market. already tons of them on taobao/alibaba, and a few better of them like BlitzWolf also available for the Western market.Well that termination voltage looks good, so the E3 must be really inefficient,
see? again around 50%
really typical number because you reference capacity instead of energy.
So from an 3400mah cell, you only get approx 1630mah of power, and then the device you are charging has an charging efficiency as well, so there is a lot of wasted energy.
i just did a quick simple test myself with a single 1x Sanyo NCR18650GA 3500mAh nonimal (fully charged, condition Like New) in the tomo. i don't have a 1amp load, so i simply charged my depleted cr*ppy phone battery. what matters is that the system (=tomo+1xNCR18650GA) refused to continue charging after "1540mAh" (USB meter) had been transferred. I could restart the tomo with its ON/OFF switch and there'd be a ~0.9A current at the USB port, but after a few seconds the system would turn off automatically again. After taking out the warm Sanyo cell and letting it rest for a while, its offline voltage was ~3.40V. As we know from energy balance, the actual battery current draw must have been higher than the 0.9A, and at that high current draw the actual capacity of the Sanyo may be 3300mAh, not 3500mAh. Rough calculation, the Sanyo delivered ~3100mAh capacity (~200mAh difference because at 3.40V the Sanyo isn't fully depleted!) but only 1540mAh got delivered at the USB port. That's a capacitive efficiency of 49.7%, or 50% (rounded).
My USB meter does not measure energy, too bad, hmm. :thinking:
One could do the same simple test with other "powerbanks" like the USB chargers by Nietcore, Littokaala, Obus, Xstar, and you'd get about the same result, a capacitive efficiency of ~50%.
I put 4 x 18650 3400mah (NCR18650B) in my Soshine E3, that`s 13600mah and put an connected an usb power meter, and then connected an 1amp resistor load.
Once the Soshine E3 shut down due to low battery i checked the usb power meter, It only showed 7750mah had been pulled from the power band, that has a capacity of 13600mah, that means only 57% of the power banks capacity is available with an 1amp load, that`s not very good... .
I checked amazon, looks like Anker has updated their flagship model of the powercore+ powerbank series from QC2.0 to QC3.0, good for them! Soon enough all other powerbank manufacturers will offer their products with QC3.0 compatibility, no doubt. As mentioned earlier, on toabao and alipapa there are already lots of noname powerbanks with QC3.0 technology. Maybe not certified by Qualcomm, i dunno.For the most compact portable QC3.0 powerbanks i'd choose BlitzWolf or Xiaomi or alike, for 18650 exchangeability i'd hope for the new TOMO which is hopefully more efficient than our old unit.