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  • Picture of Multi Charger-A4 21700 Battery
Picture of Multi Charger-A4 21700 Battery

Multi Charger-A4 21700 Battery

$34.90

Broad spectrum of Li-ion, LiFePO4, Ni-MH, Ni-CD rechargeable cell size.Supporting AC charging and DC charging.A4 Charger automatically identification of Li-ion/Ni-MH/Ni-CD battery, manually select the LiFePO4 battery.Each of the four battery slots monitors and charges independently.LCD display of each cell’s voltage, charging current, charging time and battery type. Advanced protection against short circuiting, overcurrent, overcharging and wrong polarity direction.

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SPEC

  • Input: 100-240V(AC), 50/60Hz, 600mA(Max)    12V-24V(DC) 2000mA(Max)
  • Output: 4.2V/3.65V/1.5V 500mA x 4/1000mA x 4
  • Size: 145 (L) x 104 (W) x 39.5 (H) mm
  • Weight: 260g
  • Complaints: TUV GS FCC CE C-TICK CB ROHS

HOW TO CHARGE?

  • Plug the power cable into a standard AC outlet or plug the car adapter into the cigarette lighter in your vehicle.
  • No operation for > 30 seconds, it will start the energy saving by lowering screen brightness
  • Reversely insert the battery, "Err" (Error) will shows up
  • It will auto-identify battery type
  • Default current is 500mA, 1000mA is available
  • Button A/B/C/D
    Short press 1S:  select 500mA or 1000mA
    Long press 5S:  swap charging modes
  • For safety, it will auto-stop charging when it reaches 12 hours
  • Taking out batteries and unplug the power when the charging is done

TIPS

  • Disconnect the power supply when charging is completed.
  • Do not attempt to charge with AC and car power sources at the same time.
  • Do not attempt to dismantle or modify A4 multi charger or use it for other purposes.
  • As an electrical appliance, keep the charger out of reach of children.
Existing reviews
very nice - mult-chemistry
Very quick charger, that can take care of most types, including NI-MH batteries! Has protection and smart features too!
[hide member info] | 1/19/2026 6:01 PM
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Good
Multi-chemistry support handles everything from tiny 10440s to fat 21700. LCD displays precise charge status instead of vague indicators. Compact form fits travel or workbench easily. Solves all battery charging headaches.
[hide member info] | 1/13/2026 1:00 PM
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Good charger
Solid multi-chemistry charger that handles Li-ion, NiMH, and more with independent slots and a clear LCD display for voltage and status. Good protections and dual AC/DC input make it reliable for everyday battery charging
[hide member info] | 12/23/2025 6:19 AM
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Excellent charger.
Compatible with many types and sizes of batteries. Some chargers won't accommodate longer batteries -this one does. You get a varied choice of charging amperage with a detailed display of battery dynamics. It seems everyone in the world wants the fastest charging battery and device available, but this comes at the expense of battery longevity. You get a choice of 500mA or 1,000mA. I prefer a slower and steadier charge. Treat your batteries nice and they will serve you well.
[hide member info] | 2/24/2024 2:55 PM
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Better than my other chargers.
I like this one better than my other chargers. It's compatible with more types of batteries, has an LCD display, and has more advanced charging and protection features than most cheap chargers on the market. The price is actually very good for what it is.
[hide member info] | 5/26/2023 9:36 AM
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fast charger
good quality. very function for all tipy battery
along | 4/20/2022 11:23 AM
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very good!
Using for 18650 battery. Fast charging is very useful and big LCD is easy to check battery status. Price is also nice👍
Yoshikaze | 9/18/2021 10:11 AM
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Become an Acebeam Distributor: Precision Illumination for Professionals

Become an Acebeam Distributor: Precision Illumination for Professionals

In the field, whether you are navigating a complex cave system, conducting a tactical patrol, or executing a search and rescue operation, reliable illumination is not a luxury—it is a critical survival tool. At Acebeam, we understand that professionals demand absolute precision. We do not manufacture toys; we engineer high-performance lighting instruments designed to withstand extreme conditions.

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Our Engineering Philosophy
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We invite established companies in the outdoor, tactical, law enforcement, and industrial sectors to apply. Ideal partners possess:

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