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Keyline Battery Chargers, Maintainers, Battery Isolators, and Accessories

Keyline Battery Chargers, Maintainers, Battery Isolators, and Accessories


Automatic Protection

Multi-faceted safety features including reverse polarity protection, surge protection, over-voltage protection, short-circuit protection, spark-free connection, and IP65 dust and liquid resistant.

Weather Resistant

Holds IEC certification #IP65 - the ultimate in hazard-based electrical safety standards established by the IEC (International Electrotechnical Commission).

Ultra-Bright LED Indicator Lights

Includes 1 red and 2 green ultra-bright LED lights to indicate the status of your battery and which of the five charging modes your battery is in.

Advanced Diagnostics

Analysis phase identifies deeply discharged and dead batteries. This process takes only about 3 minutes.


With advanced micro-computing, adjusts to charging of multiple types of batteries. Compatible with all lead-acid and sealed batteries, (AGM, GEL, MF).

Smart Charging

Keyline Automatic Battery Chargers and accessories were designed rugged, portable and compact. Unlike other “smart” chargers on the market today, Keyline Chargers feature a unique 5-stage process. Just set it and forget it!  

A new charging cycle will automatically restart when the battery voltage falls below 12 V. If the charging cycle is interrupted, a new cycle will start.


One-of-a-kind desulphation stage improves charging speed and efficacy, extending the overall life of your battery significantly – up to 4X!


Made to do more than your average trickle charger. Designed with a exclusive 5-stage process. 1) Desulphation, 2) Bulk Charge, 3) Absorption, 4) Analysis, and 5) Float, all while simultaneously monitoring each stage.


5 Year Warranty

All the Keyline Mini-Pro Automatic Battery Chargers are inspected and tested prior to shipment. If you are not 100% satisfied with your purchase, take advantage of our 30-Day Money Back Guarantee.



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