Skip to Main Content »

Security Seals

Welcome to Impact Battery!

Battery Tender Plus 12 Volt Smart Charger
Move your mouse over image or click to enlarge

Battery Tender Plus 12 Volt Smart Charger

Quick Overview

Deltran 1.25 Amp Microprocessor Controlled 4 Stage Battery Charger/Maintainer
  • Availability

    In Stock

  • Product Brand


  • Model Number


  • Voltage (VDC)


  • Max DC Current (A)


  • Warranty

    10 Year

The Battery Tender Plus is a 1.25 amp battery charger designed to fully charge a battery and maintain it at proper storage voltage without the damaging effects caused by trickle chargers. Included is a quick connect harness for hard to reach areas. This unit is perfect for charging motorcycle, ATV's or any powersport vehicle and will do an excellent job maintaining car and farm equipment batteries. Temperature compensated to ensure optimum charge voltage according to ambient temperature. Automatically switches from full charge to float charging mode. Battery Tender at 1.25 amps will charge as fast or faster than any 3 amp charger available. Reverse Polarity Protection to ensure user safety. Red & Green Lights Alternately Flash in this condition. Complete 4-step charging program (Initialization, Bulk Charge, Absorption Mode, Float Mode). 10 year Warranty!
Product Specs
Availability Note: In Stock
Brand: Deltran
Model: BT-021-0128
Chemistry: Lead Acid
Input Frequency (Hz): 60
Voltage (VDC): 12
Input Voltage (VAC): 115
Output Voltage - Charging (V): 14.6
Max AC Current (A): N/A
Output Voltage - Float (V): 13.3
Output Banks: 1
Max DC Current (A): 1.25
Ripple (%): No
Operating Temp. Range (oC): 4-140
Warranty: 10 Year
Dimensions (LxWxH - metric): 124 x 84 x 74
Weight (lb): 2.8
Dimensions (LxWxH - inches): 4.9 x 3.3 x 2.9

FAQs About This Product

Ask a Question

  • Can I charge a VRLA battery with the Battery Tender unit? I have a Yamaha ef63000 generator
    Yes the Battery Tender Plus charger will work on a sealed valve regulated battery.
    Rate This Answer:

  • Does the Deltran Battery Tender Plus 12V charger come as pictured with the alligator clips and the quick disconnects?

    YES. Everything in the picture comes with the charger. You can even buy 5ft, 10ft, and 25ft DC line extension cables, USB 5V charging adapter or a cigarette lighter adapter plug. There are several accessories that attach to this SAE style plug.

    Rate This Answer:

  • Do I need a new Battery Tender if the red light is flashing?
    No... RED LIGHT FLASHING (All models except 6V Junior) – The red light flashing indicates that the battery charger has AC power available and that the microprocessor is functioning properly. If the red light continues to flash, then either the battery voltage is too low (less than 3 volts) or the output alligator clips or accessory ring terminals are not connected correctly or have a blown fuse.
    Rate This Answer:

  • What do I have to do to fix a blinking red light?

    Check to see if your fuse is blown; if so replace it with another one. Confirm your clamps are securely on the battery terminals. Check the voltage on your battery with a multi-meter, if it is too low you can try a parallel charge. You can read more on parallel charging here. Scroll down to the yellow chart for the actual parallel charge steps.

    Rate This Answer:

  • Is a cigarette lighter adapter included in purchase?
    No. The charger comes with the clamps and eyelets. The 12V cigarette lighter adapter is an add-on product. This link is for the adapter that includes the BMW tip, its works with all types of 12V sockets.
    Rate This Answer:

  • Why does the btplus alternate between red and green lights. No charging or storage indicated?

    This is not normal and indicates the battery is too sulfated for the Tender to overcome or there is a poor connection between the clamps and the terminals. You may want to consider purchasing a true desulfating charger like one made by VDC Electronics (BatteryMINDer) or the XC100-P by PulseTech.

    Rate This Answer:

Product's Review