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E-FAST 25A Smart Car Battery Charger, 12V/24V Automatic Automotive Battery Maintainer & Desulfator with 200s Booster Mode - Adjustable Amp Trickle Charger for Lead-Acid, AGM, Gel, LiFePO4

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Availability: 20 left in stock
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Arrives Tuesday, Apr 21
Order within 6 hours and 23 minutes
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Features

  • 25A Rapid charging for 12V & 24V Batteries: Engineered for heavy-duty performance. Delivers a powerful 25A output for 12V batteries and 15A for 24V batteries, charging significantly faster than standard maintainers. Perfect for larger vehicles including Trucks, SUVs, Boats, and RVs. Universally compatible with Lead-Acid (AGM, GEL, SLA, Flooded, EFB) and LiFePO4 Lithium batteries. Note: Intelligent chip automatically detects 12V or 24V connection.
  • 5-LEVEL adjustable current & customised charging: Stop using "one-size-fits-all" chargers. This device offers 5 manual current selections: 2A, 8A, 20A, 25A, and Auto Mode. Select 2A for small batteries (Motorcycles, Lawn Mowers) to prevent overheating, or switch to 25A for rapid charging on large vehicles (75-400AH). The "Auto" mode intelligently detects battery internal resistance to choose the optimal charge rate.
  • Emergency Booster Mode (Jump Start Assist): Dead battery won't start? Switch to the dedicated "BOOSTER" mode. It delivers a maximum current surge for 200 seconds to rapidly revive a depleted battery, helping you jump-start your vehicle immediately after the countdown ends. A must-have emergency tool for your garage. Note: Booster function is for 12V batteries only.
  • Pulse repair & all-weather protection: Features an advanced 8-Stage Charging Process including a dedicated Repair Mode (16 hours) to help recover old, idle, or sulfated batteries and extend their lifespan. Built-in temperature sensors automatically detect ambient heat: it activates Winter Mode (<10C) to boost voltage for a full charge in cold weather, and Summer Mode (>28C) to prevent overcharging in heat.
  • Durable aluminium housing & Active cooling: Unlike plastic competitors, our charger is built with a rugged Aluminum Alloy Shell and a built-in cooling fan. This design ensures superior heat dissipation during high-amp charging (25A), preventing overheating and ensuring consistent performance. Safety is paramount with protection against reverse polarity, sparks, short circuits, and over-charging.

Brand: E-FAST


Color: Red


Product Dimensions: 8.5"D x 4.9"W x 7.5"H


Item Weight: 3.7 Pounds


Output Voltage: 12 Volts, 24 Volts


Output Voltage: 12 Volts, 24 Volts


Input Voltage: 110 Volts


Current Rating: 25 Amps


Amperage: 25 Amps


Item Dimensions D x W x H: 8.5"D x 4.9"W x 7.5"H


Item Weight: 3.7 Pounds


Package Weight: 1.75 Kilograms


Item Dimensions: 8.5 x 4.9 x 7.5 inches


Specification Met: UL


Warranty Description: 1 YEARS


Color: Red


Brand: E-FAST


Bullet Point: 25A Rapid charging for 12V & 24V Batteries Engineered for heavy-duty performance. Delivers a powerful 25A output for 12V batteries and 15A for 24V batteries, charging significantly faster than standard maintainers. Perfect for larger vehicles including Trucks, SUVs, Boats, and RVs. Universally compatible with Lead-Acid (AGM, GEL, SLA, Flooded, EFB) and LiFePO4 Lithium batteries. Note Intelligent chip automatically detects 12V or 24V connection., 5-LEVEL adjustable current & customised charging Stop using "one-size-fits-all" chargers. This device offers 5 manual current selections 2A, 8A, 20A, 25A, and Auto Mode. Select 2A for small batteries (Motorcycles, Lawn Mowers) to prevent overheating, or switch to 25A for rapid charging on large vehicles (75-400AH). The "Auto" mode intelligently detects battery internal resistance to choose the optimal charge rate., Durable aluminium housing & Active cooling Unlike plastic competitors, our charger is built with a rugged Aluminum Alloy Shell and a built-in cooling fan. This design ensures superior heat dissipation during high-amp charging (25A), preventing overheating and ensuring consistent performance. Safety is paramount with protection against reverse polarity, sparks, short circuits, and over-charging., Emergency Booster Mode (Jump Start Assist) Dead battery won't start? Switch to the dedicated "BOOSTER" mode. It delivers a maximum current surge for 200 seconds to rapidly revive a depleted battery, helping you jump-start your vehicle immediately after the countdown ends. A must-have emergency tool for your garage. Note Booster function is for 12V batteries only., Pulse repair & all-weather protection Features an advanced 8-Stage Charging Process including a dedicated Repair Mode (16 hours) to help recover old, idle, or sulfated batteries and extend their lifespan. Built-in temperature sensors automatically detect ambient heat it activates Winter Mode (<10°C) to boost voltage for a full charge in cold weather, and Summer Mode (>28°C) to prevent overcharging in heat.


Title: E-FAST 25A Smart Car Battery Charger, 12V/24V Automatic Automotive Battery Maintainer & Desulfator with 200s Booster Mode - Adjustable Amp Trickle Charger for Lead-Acid, AGM, Gel, LiFePO4


List Price: 79.99


Mfr Part Number: TK2500


Manufacturer: EFAST


Model Number: TK2500


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Apr 21

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Actually revived my "dead" batteries.
When this thing arrived and I saw how small it was compared to my previous chargers, I was not expecting much... all I can say is, never judge a book by its cover! Because this thing works great. I have put two older batteries on it in the repair mode setting and it brought them back to life; they actually hold a charge and sit at 12.6V consistently! ... show more
Reviewed in the United States on March 20, 2026 by Justin

  • does what they said it would
work very well does what it was said to do and so far hasn't let me down and has brought a few old dead batteries back to life and full working order so it was money well spent.
Reviewed in the United States on March 11, 2026 by David H.

  • hard to see in daylight.
I haven't used this on a really dead battery yet. I am counting on the 200 sec. boost charge to charge the battery enough the fault circuit in the unit does not prevent the charger to work. the only other thing I noticed was that this is very easy to read at night. But in the daytime with the sun out, you really can't see the display. It's all black. I don't think this is the only product this way. ... show more
Reviewed in the United States on March 30, 2026 by J. Busse

  • Useful charger for mixed battery needs
This came in handy for reviving and maintaining a few different batteries, including one in a truck that had been sitting longer than planned. The charger feels more capable than a basic trickle charger, and the adjustable settings make it useful when working with more than one battery type. The display and automatic functions also make it easier to monitor what is going on without a lot of guesswork. It is compatible with both 12V and 24V electrical systems and the attached clamps make it easy to connect the battery without special tools. It does take a little reading to understand the different modes if you are not used to battery chargers beyond the simplest kind. Once set up properly, though, it worked well for charging and maintenance duties in the garage. For the price, it feels like a solid value for anyone who deals with stored vehicles, seasonal equipment, or multiple battery types. Best for users who want something more flexible than a bare-bones charger. ... show more
Reviewed in the United States on March 21, 2026 by Nikonographer

  • Very good battery charger.
Was a good purchase. I used it right away and it was easy to setup. Plugged in and hooked up to my battery and it pretty much set itself for my battery. Was very impressed.
Reviewed in the United States on March 23, 2026 by Jack K.

  • Good value
Not impressed first unit mode switch did not work. Amazon replaced it with a second identical unit and same problem Can not change modes instructions are a joke. Returning both find somthing else.
Reviewed in the United States on April 3, 2026 by Redtail 60

  • Works great!
This charged a 24v 100ah 2.56kw LiFePO4 battery from 25% to fully charged in about 10 hours. Works great with a quiet fan and the unit does not heat up.
Reviewed in the United States on March 10, 2026 by Dr.J

  • Works great very easy to operate
Everything worked as advertised. I was extremely surprised with how fast it charged the batteries to my boat and the two batteries on my RV
Reviewed in the United States on March 11, 2026 by Paul

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