Voltaic V25 USB Battery Pack

The Voltaic V25 USB Battery Pack delivers reliable, always-on power with solar-optimised charging, pass-through capability, and USB-C PD.

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The Voltaic V25 USB Battery Pack is a compact 6,700mAh (24Wh) USB battery pack designed specifically for solar charging and continuous power applications.

It features dual USB-A outputs with always on technology, ensuring devices stay powered even at low current draw, alongside a USB-C PD port for fast input and output.

Pass-through charging allows the V25 USB Battery Pack to power devices while recharging itself, making it suitable for remote systems, time-lapse setups, and off-grid projects.

Can be recharged from a 6V solar panel or any USB/USB-C port.

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Lithium Battery Shipping: Due to courier restrictions, this product can only be shipped within England/Wales. With this item in your cart, your shipping options will be limited to DHL. Why?

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Features

• 6,700mAh (24Wh) compact USB battery pack
• Dual USB-A outputs with Always On technology
• USB-C Power Delivery port for fast input and output
• Pass-through charging capability
• Optimised for solar charging
• Ideal for remote systems, time-lapse setups, and off-grid projects
• Powers devices whilst recharging simultaneously

Specifications

Size and Weight

• Dimensions: 8.0 x 8.2 x 2.4cm
• Weight: 230g

V25 USB Battery

• Capacity: 6,700mAh, 24 Watt Hours
• Output: 5V/2A , 3A max (2 outputs)
• USB-C Input Solar: 5-6V/2A
• 3.5x1.1mm Solar Input Port: 5-6V/2A
• USB-C PD Input / Output (Top USB-C port): 5V/3.6A, 9V/2.2A, 12V/1.6A
• Minimum Charge Current: 5mA (indicators turn on at 60mA)
• Maximum Power Point (MPP): 5.2V
• Battery Type: Li-Ion
• Protection: Short circuit over charge, over discharge, over temperature (45℃ Input Cut-off, 60℃ Output Cut-off), under temperature (0℃ Input Cut-off, -15℃ Output Cut-off)
• Safe for air travel (Carry-on Luggage Only)

Always on mode

Battery features updated Always On technology on the 2X USB-A ports. The USB-C PD port should not be used for power output or input when using Always On. The USB-A output will not shut off even if your device is drawing low or no power. There is no low current cut-off.

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).

Compatibility

• Smartphones: Charges all USB Devices including all Apple and Android smartphones.
• Tablets: Charges all tablets that are powered by USB including Apple iPads and Samsung Tablets. Will not charge tablets that charge at 12 or 16 Volts.
• Digital Cameras: Charges cameras that charge from USB. For DSLRs, use an optional USB camera charger cradle that matches your camera battery.
• Microcontrollers: Compatible with USB powered microcontrollers including Arduino, Raspberry Pi and more.

Device charge times

Device	V25 Battery	Smartphones	DSLR Cameras	7” Tablets	12” Tablets
Number of Charges from Battery	-	1.8	1.6	1.0	0.5
Hours to Charge from Solar Panel*	6.0	4.0	4.6	6.6	15.3

*Solar charge times based on use with the 5 Watt Solar Panel.

Resources

• STEP Model

Package Contents

• 1x Voltaic V25 USB Battery Pack
• 1x USB to USB-C Charging Cable