The YTX4L-BS GEL is a 12-Volt 3 Ah GEL (Maintenance Free) battery. Requires no addition of water during the life of the battery. The MIGHTY MAX YTX4L-BS GEL is a TRUE DEEP CYCLE battery that can be mounted in any position, requires no maintenance. When a GEL Cell battery is charged, no hazardous fumes escape the battery case, gases are processed within the battery itself. No acid mist and pollution to the environment when charging and discharging. This Battery is Low self-discharging and durable for storage and has a nice ability for resilience after over-discharge and the capacity of high discharge current increases by 30% over VRLA. Common uses for the YTX4L-BS GEL: ATVs, Motorcycles, Personal Watercraft, Jet Ski's, Snowmobiles and more. Factory activated GEL battery, maintenance free, no acid pack needed, advanced design works right out of the box and requires no maintenance yet offers the option to prolong the standard life by adding extra electrolytes. True deep cycle battery that can be mounted in any position, resists shocks and vibration, long-lasting high performance in high and low temperatures. Environment friendly, leaving no pollution to the environment while charging and discharging, zero fumes or chemicals escape the battery casing, all chemical reactions are done within the battery itself. Polarity: negative on left, positive on right, listing is for the battery and screws only, no wire harness or mounting accessories included.