How long does it take to charge the portable charging case? I've had it on the charger for about 3 hours and the light is still red. 
I've been thinking for awhile about a novelty PCC with a hand-crank. Either hand-crank PCC or a hand-crank powered PV... Seems like in the winter, there's always someone with not enough charged batteries. Need emergency vaping services. EVS.![]()
Yup. Very similar. But not the shake flashlights (the inductive coil just can't generate the current)
A good number of years back I did a contract design for a company of an emergency radio. Could be powered off of just about anything. Adapters for half a dozen different batteries, had a little solar panel, a hand-crank on the side, world-wide AC adapter, car adapter, etc.
We didn't have ultracapacitors back then like we do now. They'd make a world of difference.
Can't imagine that a "mod" like that would be anything but a "what a weird novelty!" item, but still sounds amusing.
I've been thinking for awhile about a novelty PCC with a hand-crank. Either hand-crank PCC or a hand-crank powered PV... Seems like in the winter, there's always someone with not enough charged batteries. Need emergency vaping services. EVS.![]()
I can whole-heartedly recommend these: Amazon.com: Sunpak Sc-2800 Solar/USB NiMH 2800 mAh Battery Charger: Electronics
I haven't tried running a PT from it, but paired with a couple USB charger, they'll simultaneously charge two V4L batteries. I leave it on the dashboard of the car in the driveway to keep it charged. If I need to charge V4L batteries in the field, I just plug the chargers into it, a couple hours later, I have batteries. Then I toss it back on the dash again to top off its battery.
In theory, it should be able to charge V4L batteries 9-12 times on a single full solar charge (which takes basically all day to recover).