Voltaic Systems USB Lithium Ion Batteries - Dynamo Optimized
Sorry, no sales of Li-Ion batteries outside the U.S.
The Voltaic line of USB charge batteries is one of the few on the market that have three key factors that are important in a dynamo charging bikepacking scenario. The units are designed to accept a trickle charge like you see on dynamo hubs, offer pass through charging (provides outflow from the battery at the same time the battery is being charged), and provide low-current flow with no automatic shut off (this is critical for some low-current-draw devices - like the 40mA kLite Qube). This last feature is sort of like a lo-fi uninterruptable power supply (UPS) and super rare among USB batteries. The other rare feature? It has redundant inputs - one that's micro-USB and one that's USB-C. This redundancy is super appreciated in the bikepacking vibration environment where the best of cables are laid to waste in a fairly rapid fashion from trail vibration.
During the daytime, you'll want to keep the light off on your kLite so that all of the dynamo power flows into the kLite dual USB charger--and into your Voltaic battery. If any of your devices are running low, use the pass through charging feature by charging them with USB leads from the Voltaic. When night falls, flip the kLite ULTRA lamp on, unplug the Voltaic battery, and then run the charging lead from the kLite dual USB charger directly into the GPS.
Three units are available - all three have identical operation and vary only in capacity, size, and weight.
All three offer:
- two charging inputs (USB-C - 5V/2A and MicroUSB -5-6V/2A)
- two charging outputs (USB-A x 2, 5V/2A , 3A max
- LED charge indicator
- Battery Type: Li-Ion
- Protection: Short circuit over charge, over discharge, over temperature (35℃ Input Cutoff, 45℃ Output Cutoff), under temperature (0℃ Input Cutoff, -20℃ Output Cutoff)
- Minimum Charge Current: 5mA (indicators turn on at 60mA)
- Maximum Power Point (MPP): 5.2V
Always On Mode
Battery features updated Always On technology as its standard state and will not shut off even if your device is drawing low or no power. There is no low current cutoff.
To stop charging your device, double tap the Power Level Button or disconnect from the battery. To resume charging, tap the Power Level Button once.
Battery recovers into Always On mode after discharge, over-temperature and under-temperature events. Power consumption in Always On mode is approximately 7mA (26mW).
Specifications for the V25:
- 7.7 x 7.8 x 2.6 cm
- 160 grams
- Capacity: 6,400mAh, 23 Watt Hr
Specifications for the V50:
- 11.4 x 7.8 x 2.6 cm
- 272 grams
- Capacity: 12,800mAh, 47 Watt Hr
Specifications for the V75:
- 15 x 7.8 x 2.6 cm
- 382 grams
- Capacity: 19,200mAh, 71 Watt Hr
Looking for a battery that's waterproof / submersible? Check out our line of Nitecore bikepacking batteries.