Skipper's Locker

Trojan J305E-AC 6V Flooded Lead Acid Battery

Brand:
Trojan
Part no:
J305E-AC

Image: Trojan

Where to buy

Specifications

Chemistry
Flooded
Role
Deep cycle
Voltage
6 V
Dimensions (L x W x H)
12.35 x 6.85 x 14.41 in
Terminals
Embedded Universal Terminal (EUT)
Capacity
305 Ah at 20-hour rate

The Trojan J305E-AC is a 6 volt flooded lead acid deep cycle battery. It is rated 305 Ah at the 20-hour rate, and marine and boating is one of its listed applications. It weighs 83 lb and has braided rope handles for carrying. Self-discharge is given as 5 to 15 percent a month, a HydroLink single-point watering system is available, and the terminal is the embedded universal type.

Our take

The J305E-AC is rated 305 Ah at the 20-hour rate on 6 volts, and at 83 lb the braided rope handles matter when lifting it into place. Trojan lists marine and boating among its uses, and a single-point watering system is an available option.

From our buying guide

A starting battery delivers a short burst of strong power, a deep-cycle battery a low, steady level for longer, and a dual-purpose battery a balance of the two. Buy for the job it will do.

Check before you buy:

  • You've measured the tray against the maker's real dimensions, since a BCI group gives maximum sizes and some batteries sold as a drop-in run longer.
  • You're comparing the same rating. Cold cranking amps are tested at 0°F and cranking amps at 32°F, so the second number is higher.
  • If it's lithium, the maker says whether it may start an engine, and NMMA advises contacting your boat's manufacturer or a certified technician before replacing lead-acid.

Sources