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Battery Tender®

Power Tender® 4 Amp 12V/6V Battery Charger and Maintainer

022-0209-BT-WH

Regular price $104.95
Sale price $104.95 Regular price $104.95
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Power Tender® 4 Amp 12V/6V Battery Charger and Maintainer

$104.95

Description

Four amps. Two voltages. Full Multi-Chemistry support. The Power Tender® 4 Amp 12V/6V delivers efficient, high-output charging for lead-acid and Lithium batteries at either 6V or 12V — with ISM (Infinite Sequential Monitoring™) ensuring precision at every stage from initial recovery through indefinite float maintenance for both chemistries.

The 4 Amp Advantage

At 4 Amp output, the Power Tender® charges automotive batteries more than three times faster than a 1.25 Amp maintainer during the bulk phase. A fully depleted 60Ah car battery that takes over 48 hours to recover at 1.25 Amp recovers in under 15 hours at 4 Amp — with ISM managing the taper and transition to float automatically. For vehicles that need to be back in service quickly, or batteries too large to recover efficiently at lower outputs, 4 Amp is the practical charging threshold for most passenger vehicles.

Multi-Chemistry: Lead-Acid and Lithium

A manual chemistry selector delivers the correct ISM charging profile for either lead-acid or Lithium (LiFePO4) batteries. Lithium batteries require higher absorption voltages and a different float protocol than lead-acid — applying the wrong profile damages the battery over time. The Power Tender® 4 Amp eliminates this risk: select the chemistry once, and ISM delivers the correct voltages, tapering, and maintenance protocol for that battery type at either voltage setting.

ISM: 4-Stage Charging at 4 Amp

  • Initialization — Battery health check and polarity confirmation before current flows at the selected voltage and chemistry
  • Bulk Charge — Full 4 Amp output restores depleted capacity efficiently at the correct voltage for the selected chemistry
  • Absorption — Current tapers automatically as the battery approaches full charge, eliminating overcharge heat damage for both lead-acid and Lithium
  • Float Maintenance — Delivers the correct maintenance protocol for the selected chemistry indefinitely, 24/7, without overcharging

Compatible battery size range: 14Ah to 100Ah at 6V or 12V. Lead-acid: flooded, AGM, gel cell, and sealed maintenance-free. Lithium: LiFePO4.

6V Applications

  • Classic and antique automobiles with 6V systems
  • Vintage motorcycles and pre-1960s vehicles
  • Antique tractors, farm equipment, and machinery
  • Any 6V lead-acid or Lithium battery from 14Ah to 100Ah

12V Applications

  • Cars, sedans, and compact SUVs
  • Pickup trucks and full-size SUVs
  • Motorcycles and touring bikes
  • ATVs, UTVs, and side-by-sides
  • Boats and marine vessels
  • Lawnmowers and garden tractors
  • RVs and campers
  • Any 12V lead-acid or Lithium battery from 14Ah to 100Ah

Dual Voltage — One Charger for the Entire Garage

The manual 6V/12V selector delivers full 4 Amp output at either voltage. For garages that maintain both vintage 6V vehicles and modern 12V vehicles — with either lead-acid or Lithium batteries — one Power Tender® 4 Amp replaces multiple separate chargers with one intelligent unit.

Automatic Temperature Compensation

Charge voltage adjusts automatically based on ambient temperature at both voltage settings — delivering the correct charge profile in cold winter storage and hot summer conditions without manual adjustment.

Safety Features

  • Spark-proof connection — No current flows until polarity and connection are confirmed correct
  • Reverse polarity protection — Automatic shutdown if connections are reversed, protecting Lithium BMS systems and ECUs
  • Short-circuit protection
  • ETL and CETL certified

After Charging: Indefinite Float Maintenance

After the Power Tender® 4 Amp completes bulk and absorption charging, ISM transitions to the correct float maintenance protocol for the selected chemistry automatically. Batteries do not need to be disconnected. Sulfation in lead-acid batteries is prevented entirely through continuous float maintenance. Battery life consistently extends from 2–3 years to 5 years or more.

3-Year Limited Warranty | DeLand, Florida Since 1965

What's the returns policy?

Most Battery Tender by Deltran product support issues can be resolved remotely without sending the unit in for evaluation or service. Before initiating a return, please contact Battery Tender customer support at support@deltran-global.com or 386-736-7900 for troubleshooting and diagnostics.

If you are not 100% satisfied with your purchase, you may return the product for a full refund of the purchase price (shipping charges are non-refundable) or exchange it for another item. Returns or exchanges are accepted within 30 days of the original purchase date.

To initiate a return, please email returns@deltran-global.com to request approval. We reserve the right to deny refunds for items returned without prior approval.

Shipping Your Return

  • Customers are responsible for the cost of return shipping.
  • Shipping charges are non-refundable.
  • If you are returning an item valued over $49.95, we recommend using a trackable shipping service or purchasing shipping insurance. We cannot guarantee receipt of returned items.

Restocking Fees for Damaged or Incomplete Returns

Returned products must be in original condition with all accessories, packaging, and components included. Items returned incomplete, damaged, or with missing parts may be subject to a restocking fee. The fee amount is determined based on the condition of the returned product and the extent of missing or damaged components. We reserve the right to deny a full refund for items that are not returned in resaleable condition.

How fast is shipping?

Please review your shipping information for accuracy before submitting an order. Battery Tender® is unable to cancel or change a shipping address once the order has been placed. 

Battery Tender offers Standard (3-4 business days), Ground (5-8 business days), and Expedited (1-3 business days) shipping service options: 

  • For orders over $99.95, the cost of Standard/Ground shipping is free to the 48 contiguous US states. 
  • For orders under $99,95, the cost of Standard/Ground shipping is a flat rate of $9.95 to the 48 contiguous US states. 
  • Expedited shipping is a flat fee of $14.95 to the 48 contiguous US states.  
  • Ground shipping is a flat fee of $25 for orders shipped to AK, HI, USVI, and PR. We do not offer Standard or Expedited shipping outside the 48 contiguous US states

Normal processing time is 2 days from receipt of order, excluding holidays and weekends. Delivery times are estimates and are not guaranteed, as shipments may be affected by weather-related delays or events outside of our control. Carrier will be selected at the sole discretion of Battery Tender.

You will receive a shipping confirmation email containing tracking information once your order has shipped. Tracking will be active within 24 hours of the shipping confirmation email.

Please note, we do not ship internationally or to PO Boxes or APO/FPO at this time.

Does it come with a warranty?

Most Deltran product support issues can be resolved remotely without sending the unit in for evaluation or service. Before initiating a warranty claim please contact Deltran technical support at support@deltran-global.com or (877) 456-7901 for troubleshooting and diagnostics.

Complete the request form below to initiate a warranty claim.

WARRANTY REQUEST

Deltran warrants its products for a period of up to 10 years, depending upon the model, from the date of original purchase against defective material or workmanship only. If Deltran qualified service technicians determine that the likely cause of the product malfunction is due to either defective material or workmanship, then the product will be repaired or replaced at the discretion of Deltran. In the event that a product under warranty is discontinued, we will replace it with a comparable current model of equal or greater value.

It is the obligation of the original purchaser to forward the product, with the proof of purchase, to either Deltran or one of its authorized factory representatives.

1-90 days after purchase: Contact Deltran Returns at returns@deltran-global.com or 877-456-7901 for RGA and prepaid return shipping label.

91 days until the expiration of warranty: Shipping costs to Deltran are the responsibility of the purchaser. If the unit is faulty, we will repair or replace it and return it at no charge.

The manufacturer makes no warranty other than this limited warranty and expressly excludes any implied warranty including any warranty for consequential damages.

This is the only express limited warranty and the manufacturer neither assumes nor authorizes anyone to assume or make any other obligation towards the product other than this express limited warranty.

The manufacturer makes no warranty of merchantability or fitness for the purpose of this product and expressly excludes such from this limited warranty.

Some states do not allow the exclusion or limitation of incidental or consequential damages or length of an implied warranty so the above limitations or exclusions may not apply to you.

This limited warranty is VOID under the following conditions:

  1. The product is misused, subjected to careless handling, or operated under conditions of extreme temperature, shock, or vibration beyond Deltran's recommendations for safe and effective use.
  2. The product is disassembled or repaired by anyone who is not a Deltran factory authorized service representative.
  3. The electrical connections to either the AC input or the DC output of the charger are modified without the express written consent of the Deltran engineering department.
  4. The product was purchased from an unauthorized source. Warranty is not transferable from original purchaser.