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Hohm Tech School 4 Bay Battery Charger

Hohm School 4 Bay Battery Charger HohmTech

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Price: $17.99

Stock Status: In Stock

Product Details

Hohm School 4 Bay Battery Charger by Hohm Tech

USB-C 4 AMP continuous power supply and stability made it possible for Hohm SCHOOL4 to do what it does so well.

Thinking outside the box, while keeping simplicity and user-error prevention at the forefront with safety features. 18 months of R&D led us to develop an extremely capable charger that makes other chargers look stupid. It has a 3-tier amp BLD (battery length detection) System; has a variable input voltage IPR (input power regulator) feature. This ELIMINATES USER ERRORS, and keeps them and their li-ion batteries moving forward without delay. This is simplicity at its best, while not forfeiting usable amperage or precision.

There is no need for a screen on this charger. It is 100% autonomous. It is equipped with our BLD1 System, which automates the step up/down output so both small and larger cells charge at proper rate (0.5A, 1A, 2A per channel with 4A total distribution). Even li-ion batteries with a PCB/PCM3 are easily balanced to the correct voltage. This ensures today’s small li-ion batteries chemistry integrity is not compromised, allowing them to get the cycle life they deserve.

Applying more forward thinking targeted towards safety & performance, we integrated input voltage regulation. This is safety 101 here. This allows charger to not stress or damage USB adapters no matter the power supplying device. Fact is simple: today’s li-ion batteries need precise voltage and amperage delivery to ensure long reliable performance & life…Say hello to Hohm SCHOOL4, the ‘Professor’ of Chargers.


Product Highlights:

  • 4 Bay Charger
  • 2.0A x 2, 1.0A x 4 / 1A x 2 & 0.5A x 2 (4A Max Combined Output)
  • Completely automated with LED charge status indicators
  • Compatible will all Li-ion cells from 30mm to 73mm
  • Multiple protection features (over charge, short-circuit, wrong battery type detection and reverse polarity

Package Contents:

  • Hohm School 4 bay battery charger
  • USB-C cable
  • User Manual


  • BLD1 System – Automates charge amplification & reduction on li-ion cells
  • Input-Power Autonomous Regulator integration (no more stressing USB power adapters or ports)
  • Compatible with ALL li-ion cells from as short as 30mm to as long as 73mm
  • LED indicator that reports color and blink variation for quick/easy readout
  • PCB/PCM3 compatible so even protected cells aren’t left out in the cold
  • Protection 101: A] over charge; B] short-circuit; C] wrong battery type detection; D] reverse polarity
LED Display
Charging in Progress - Constant Red
Charging Done - Constant Green
Wrong Battery - Red Flashing
Reverse Connected - Red Flashing

Compatible with:

Li-ion 3.6V , 3.7V

Average Rating: Average Rating: 4.5 of 5 4.5 of 5 Total Reviews: 4 Write a review »

  0 of 0 people found the following review helpful:
3 of 5 Hohm work battery March 2, 2020
Reviewer: David Gentry from Harrodsburg, KY United States  
I have gotten several Holm tech batteries and they have all been great except one hohm work one will not charge at all

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  0 of 0 people found the following review helpful:
5 of 5 DAVE February 1, 2020
Reviewer: David from Randleman, NC United States  

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  0 of 0 people found the following review helpful:
5 of 5 Hohm Tech School 4 Bay Battery Charger December 9, 2019
Reviewer: Charles from TX  
Nice little charger, did not come with charging adaptor and the cable could have been a little longer. Takes 21700's. Fast shipping!

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  0 of 0 people found the following review helpful:
5 of 5 October 18, 2019
Reviewer: Andrew Rock from Seattle, WA United States  

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