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V25 USB Battery Pack

$39.00
SKU:
V25-K
(6) Write a Review
SKU:
V25-K

How it Works USB Chargers

The V25 USB Battery Pack features 6,400mAh and is the ideal portable power bank for smartphones, tablets, cameras and IoT devices or microcontrollers requiring an Always On power source.
  • Optimized to Charge from Solar
  • Pass Through Charging
  • Dual USB Ports
  • Standard Always On Feature for IoT and Time-Lapse Projects
SKU: V25-K
 
Size and Weight
  • 7.7 x 7.8 x 2.6 cm
  • 160 grams
V25 USB Battery
  • Capacity: 6,400mAh, 23 Watt Hours
  • Output: 5V/2A , 3A max (2 outputs)
  • MicroUSB Input: 5-6V/2A
  • Minimum Charge Current: 5mA (indicators turn on at 60mA)
  • Maximum Power Point (MPP): 5.2V
  • USB-C (Input Only): 5V/2A
  • Battery Type: Li-Ion
  • Protection: Short circuit over charge, over discharge, over temperature (45℃ Input Cutoff, 60℃ Output Cutoff), under temperature (0℃ Input Cutoff, -15℃ Output Cutoff)
  • Safe for air travel (Carry-on Luggage Only)
Includes
  • V25 USB Battery Pack
  • USB - MicroUSB Charging Cable
Testing and Certifications
  • UN 38.3
  • IEC 62133
  • CE
  • FCC
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).

 

How it Works USB Chargers

The V25 USB Battery Pack features 6,400mAh and is the ideal portable power bank for smartphones, tablets, cameras and IoT devices or microcontrollers requiring an Always On power source.
  • Optimized to Charge from Solar
  • Pass Through Charging
  • Dual USB Ports
  • Standard Always On Feature for IoT and Time-Lapse Projects
SKU: V25-K
 
Size and Weight
  • 7.7 x 7.8 x 2.6 cm
  • 160 grams
V25 USB Battery
  • Capacity: 6,400mAh, 23 Watt Hours
  • Output: 5V/2A , 3A max (2 outputs)
  • MicroUSB Input: 5-6V/2A
  • Minimum Charge Current: 5mA (indicators turn on at 60mA)
  • Maximum Power Point (MPP): 5.2V
  • USB-C (Input Only): 5V/2A
  • Battery Type: Li-Ion
  • Protection: Short circuit over charge, over discharge, over temperature (45℃ Input Cutoff, 60℃ Output Cutoff), under temperature (0℃ Input Cutoff, -15℃ Output Cutoff)
  • Safe for air travel (Carry-on Luggage Only)
Includes
  • V25 USB Battery Pack
  • USB - MicroUSB Charging Cable
Testing and Certifications
  • UN 38.3
  • IEC 62133
  • CE
  • FCC
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).

 

How it Works USB Chargers

The V25 USB Battery Pack features 6,400mAh and is the ideal portable power bank for smartphones, tablets, cameras and IoT devices or microcontrollers requiring an Always On power source.
  • Optimized to Charge from Solar
  • Pass Through Charging
  • Dual USB Ports
  • Standard Always On Feature for IoT and Time-Lapse Projects
SKU: V25-K
 
Size and Weight
  • 7.7 x 7.8 x 2.6 cm
  • 160 grams
V25 USB Battery
  • Capacity: 6,400mAh, 23 Watt Hours
  • Output: 5V/2A , 3A max (2 outputs)
  • MicroUSB Input: 5-6V/2A
  • Minimum Charge Current: 5mA (indicators turn on at 60mA)
  • Maximum Power Point (MPP): 5.2V
  • USB-C (Input Only): 5V/2A
  • Battery Type: Li-Ion
  • Protection: Short circuit over charge, over discharge, over temperature (45℃ Input Cutoff, 60℃ Output Cutoff), under temperature (0℃ Input Cutoff, -15℃ Output Cutoff)
  • Safe for air travel (Carry-on Luggage Only)
Includes
  • V25 USB Battery Pack
  • USB - MicroUSB Charging Cable
Testing and Certifications
  • UN 38.3
  • IEC 62133
  • CE
  • FCC
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).

 

How it Works USB Chargers

The V25 USB Battery Pack features 6,400mAh and is the ideal portable power bank for smartphones, tablets, cameras and IoT devices or microcontrollers requiring an Always On power source.
  • Optimized to Charge from Solar
  • Pass Through Charging
  • Dual USB Ports
  • Standard Always On Feature for IoT and Time-Lapse Projects
SKU: V25-K
 
Size and Weight
  • 7.7 x 7.8 x 2.6 cm
  • 160 grams
V25 USB Battery
  • Capacity: 6,400mAh, 23 Watt Hours
  • Output: 5V/2A , 3A max (2 outputs)
  • MicroUSB Input: 5-6V/2A
  • Minimum Charge Current: 5mA (indicators turn on at 60mA)
  • Maximum Power Point (MPP): 5.2V
  • USB-C (Input Only): 5V/2A
  • Battery Type: Li-Ion
  • Protection: Short circuit over charge, over discharge, over temperature (45℃ Input Cutoff, 60℃ Output Cutoff), under temperature (0℃ Input Cutoff, -15℃ Output Cutoff)
  • Safe for air travel (Carry-on Luggage Only)
Includes
  • V25 USB Battery Pack
  • USB - MicroUSB Charging Cable
Testing and Certifications
  • UN 38.3
  • IEC 62133
  • CE
  • FCC
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).

 

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.

Battery can be recharged from a 6V solar panel or any USB or USB-C port.

Compatbility

Smartphones:
Charges all USB Devices including all Apple, Android, Google, and Blackberry 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 such as a Microsoft Surface.

Digital Cameras:
Charges both DSLRs and cameras that charge from USB. For DSLRs, an optional camera charger cradle that matches your camera battery is required. Read our tutorial on solar camera charging.

Microcontrollers:
Compatible with USB powered microcontrollers including Arduino, Raspberry Pi and more.

6 Reviews

  • 5
    V25
    Posted by Matt

    Works great for running a Uhoo AQM so I can move it around the house. The Uhoo goes into low power mode constantly, and it hates being unplugged which makes it want to recalibrate all its sensors for TWO DAYS.

  • 4
    Solid battery pack, a bit large
    Posted by Tom Tumbusch

    I ordered two of these for travel, and they work great. Love that they're optimized for solar and are USB-C compatible, but I miss the slim, lightweight design of the V15.

  • 5
    Performance
    Posted by Kirby

    I use field equipment on my job and I do not go anywhere without V25's & V50's in my equipment bag. Highly recommend them.

  • 5
    V25
    Posted by August Treu

    This is a nice little unit.

  • 5
    Excellent choice for emergency backup use
    Posted by Rebecca Shanks

    I purchased three of these rather than a single larger battery. I like having two backups in case one goes out. Not that one of these failing is likely. My experience with Voltaic has been that their batteries are nearly bulletproof. I took an older model with me to Peace Corps in Kenya and used it without any problems whatsoever. Now, I'm back buying more.

    Also, I like the options multiple batteries give in terms of whether or not I can carry extra weight or need go lighter.

    One of these will charge my Iphone X twice.

  • 3
    V25-K USB battery pack with bicycle dynamo hub
    Posted by Shea Devlin

    I bought this battery pack to serve as an intermediary between a dynamo bicycle hub and a Garmin gps. The battery pack successfully charges the Garmin. However, it did not draw any significant charge from the dynamo hub. So far I have only troubleshooted this setup on shorter rides (45 min / 3 miles), and it may be that the setup will work if I am riding for several hours. Still though, I would feel better if I could see quicker evidence of this battery pack successfully drawing charge from the Dynamo hub.

    **Voltaic Comment - we are working with the manufacturer to understand why the charge rates from the dynamo are lower than expected. The battery was designed to charge efficiently from solar and there is an electrical difference between the two power sources.