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BatteryMINDer Model 48021 Desulfator Charger 48 Volt
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BatteryMINDer Model 48021 Desulfator Charger 48 Volt

Quick Overview

Save $15 W/ Coupon Code: BatteryMINDer. 48 Volt 2.1 Amp (48V 2A) Charger/Maintainer/Desulfator. Designed to charge and desulfate all conventional (wet) cell batteries by utilizing unique & targeted charge algorithms.

  • Availability

    In Stock

  • Product Brand


  • Model Number


  • Voltage (VDC)


  • Max DC Current (A)


  • Warranty

    5 Year

Original Price : $313.95

VDC Electronics 48021 BatteryMINDer Charger Overview

The BatteryMINDER® 48021 is an ideal choice for handling 48 Volt battery charging requirements. The FCC-certified 3-stage smart microprocessor-controlled BatteryMINDer® has a built-in desulfator that automatically dissolves harmful power-robbing, life-shortening sulfation using safe high-frequency "sweep pulse" technology. Safely charges any size/type or brand of 48V lead-acid battery. Works with all sizes, types and brands of 48V lead-acid batteries (Including but not limited to: flooded (filler cap / maintenance-free / VRLA / SLA), gel, AGM (Optima / Odyssey / etc.), starter, deep cycle and hybrid) — with no overcharging. Safely charges 70% to 200% faster than other conventional constant voltage chargers. Maximizes cycle life and performance of all three types of lead-acid storage batteries regardless of size, type or brand. For aviation batteries please see the aviation line as this charger is not for use with 48V aircraft batteries.

Motobatt MBVM Voltage & Alternator Tester

Get a FREE Motobatt Mini Pocket Sized Voltage & Alternator Quick Tester with the purchase of a new 48021 charger. This is a $11.95 Value and is for a limited time only so BUY NOW! Coupon Code: Voltage.


BatteryMINDer 48021 Charger Features:

  • Guaranteed to never overcharge, regardless of how long connected.
  • Temperature compensation ensures proper charge in hot or cold environments.
  • High frequency pulse desulfation.
  • Maximizes battery life and capacity, reconditions weak batteries.
  • Selectable amperage and battery type settings.
  • Microprocessor controlled, simple push button operation
  • Battery diagnostics indicators.
  • Maintains up to 8 batteries at a time.
  • 6’ AC cord, 6’ DC cord with quick connector (SAE).
  • Short circuit, spark, polarity and thermal runaway protection.
  • FCC certified.
  • 5 year warranty.

Included Acessories for the 48021 Charger:

  • 2’ Fused Battery Clip Cord Set with Quick Connector
  • 2’ Fused Ring Terminal Cord Set with Quick Connector
  • 2’ Ring Mounted Temperature Sensor and 6’ Extension Cable

BatteryMINDer Desulfator/Charger Coupon

$15 OFF*
REGULAR PRICE AT CHECKOUT AT IMPACTBATTERY.COM ONLY Save $15 off your purchase of this 48 volt 2 amp BatteryMINDer charger today! Use the coupon code: BatteryMINDer during checkout to receive your discount.


Product Specs
Availability Note: In Stock
Brand: BatteryMINDer
Model: 48021
Chemistry: Lead Acid
Input Frequency (Hz): No
Voltage (VDC): 48
Input Voltage (VAC): 110
Output Voltage - Charging (V): 57.6
Max AC Current (A): N/A
Output Voltage - Float (V): 53.6
Output Banks: 1
Max DC Current (A): 2A
Ripple (%): No
Operating Temp. Range (oC): No
Warranty: 5 Year
Dimensions (LxWxH - metric): No
Weight (lb): 4
Dimensions (LxWxH - inches): 5.5 x 5.5 x 2.5

FAQs About This Product

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  • What is a Desulfator?

    A desulfator is a device that when attached to a lead acid battery will clean the internal plates. They remove hardened sulfate crystals that have built up as a result of sulfation (see: What is Sulfation?). True desulfators use a pulse frequency to desolve these crystals vs. the less effective voltage pulse

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  • What Is Sulfation?

    Sulfation is the buildup of lead sulfate (PbSo4) crystals on your battery plates.

    Contrast image of built up of sulfate crystals on a battery.All lead acid batteries will suffer from the effects of sulfation. It is the unwanted byproduct of the natural double sulfate chemical reaction that generates electricity within the battery. When a battery is in use, the active material on your battery’s plates, lead and lead dioxide, react with the electrolyte or sulfuric acid (H2SO4) to generate electricity. During this process a thin layer of non-crystalline solid lead sulfate is deposited on the plates.

    During charging, this sulfate deposit is supposed to be converted back to lead dioxide and sulfuric acid restoring the battery back to its pre-discharged state. However, the process is not perfect. Incomplete charging or prolonged time left in a discharged state will convert the amorphous (non-crystalline) lead sulfate into a hardened crystalized form diminishing the ability of the battery to reach full charge.

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