CSB HR1221WF2 Battery Replacement 12V/5AH Sealed Lead Acid Battery: 3.57Lx2.75Wx4.00H. Terminals: F1. Chemistry: SLA. CSB HR1221WF2 replacement battery is designed to meet or exceed the original battery in quality, durability, and performance. Maintenance-free, sealed no-leak design, higher cranking amps, lower self-discharge, greater vibration resistance, heavy duty, no-corrosion terminals. THIS IS A REPLACEMENT BATTERY AND MAY BE A DIFFERENT BRAND, BUT MEETS OR EXCEEDS THE OEM SPECIFICATIONS.