This battery comes already charged, sealed, maintenance free and ready to install.
Polarity: negative on left, positive on right, listing is for the battery and screws only, no wire harness or mounting accessories included. Rechargeable battery that can be mounted in any position, resists shocks and vibration, long-lasting high performance in high and low temperatures. YTX4L-BS SLA Replaces Aeon Benzai, Bombardier, ETon, Kasea, Qianjiang SLA/AGM spill proof battery has a characteristic of high discharge rate, wide operating temperatures, long service life and deep discharge recover.