I have the simplest battery bank as per these:
http://www.ebay.ca/itm/Portable-USB...hash=item35fb9d715a:m:mEjr3X7kb1dRFBCYvpBveow
I'm pretty happy with them overall. For the cost, they seem to be good value.
I'm happy that there's a red/blue set of flashing lights to show discharge and state of charge depending on how it's plugged in.
I've read somewhere that these are always on and the light (for discharge) turns on when there's a load applied, but it's always on.
Does anyone have any experience with these?
What's the parasitic drain of these?
I'm using old 18650 cells, which surprisingly are doing quite well. I have a
Rough estimates are fine.
If it's anything less than 5% a day then I can just easily toss them in my daypack for power which I usually use and recharge at least once a week and immediately recharge no matter the amount of discharge.
I'm getting one of these soon which I think should be more accurate.
I would guess that these estimate capacity by voltage? I don't expect sophisticated electronics.
http://www.ebay.ca/itm/2600mAh-USB-...hash=item234ebc1ac4:m:mSSLcfhgrJ57_fQw_2LIJPQ
http://www.ebay.ca/itm/Portable-USB...hash=item35fb9d715a:m:mEjr3X7kb1dRFBCYvpBveow
I'm pretty happy with them overall. For the cost, they seem to be good value.
I'm happy that there's a red/blue set of flashing lights to show discharge and state of charge depending on how it's plugged in.
I've read somewhere that these are always on and the light (for discharge) turns on when there's a load applied, but it's always on.
Does anyone have any experience with these?
What's the parasitic drain of these?
I'm using old 18650 cells, which surprisingly are doing quite well. I have a
Rough estimates are fine.
If it's anything less than 5% a day then I can just easily toss them in my daypack for power which I usually use and recharge at least once a week and immediately recharge no matter the amount of discharge.
I'm getting one of these soon which I think should be more accurate.
I would guess that these estimate capacity by voltage? I don't expect sophisticated electronics.
http://www.ebay.ca/itm/2600mAh-USB-...hash=item234ebc1ac4:m:mSSLcfhgrJ57_fQw_2LIJPQ
