HR series HR 1251W 12V 51W Valve Regulated Lead Acid Battery Maintenance-Free Sealed Lead Acid Battery. Absorbent Glass Mat (AGM) technology for efficient gas recombination of up to 99%. Design for Standby Power Applications 【 Float Charging Voltage】 13.5 ~ 13.8 VDC/Unit at 25℃ (77℉) 【Equalization Charging Voltage 】 14.4 ~ 15.0 VDC/Unit at 25℃ (77℉) 【 Self Discharge】 Less than 10% after 90 days, can be stored up to 6 months at 25℃ (77℉); Fully recharging is required before usage, and charged sooner if stored at higher temperature than 25℃ (77℉). 【Design Life】 Up to 5 Years in Standby Service at 25℃ Eurobat (20℃) : 3-5 years, Standard Commercial 【 Operating Temperature Range】 Nominal Operating Temperature : 25℃(77℉) Discharge : -15℃ ~ 50℃ (5℉~122℉) Charge: -15℃ ~ 40℃ (5℉~104℉) Storage: -15℃ ~ 40℃ (5℉~104℉) Specification Design according with IEC 61056-1/2:2012 Nominal Voltage 12V (6 cells per unit) Nominal Capacity 51W @15min-rate to 1.67V per cell @25℃ (77℉) Weight Approx. 3.85 Kg (8.49 lbs) Maximum Discharge Current 180A (5sec) Internal Resistance Approx. 13.6 mΩ Short Circuit Current 462A Maximum Charge Current 5.1A Terminal types F2-Faston Tab250 / B0 terminal to accept M5 bolt Terminal hardware Torque -- Container Material ABS (UL 94-HB) & Flame Retardant (94-V0) available upon request Dimensions Length (L) 151.0±2.0 mm 5.94±0.08 inch Width (W) 98.0±1.0 mm 3.00±0.08 inch Container Height (h) 94.1±1.0 mm 3.70±0.04 inch 100.3±1.5 mm 3.95±0.06 inch Overall Height (H) Constant Current Discharge Characteristics Unit: A (25℃, 77℉) F.V/Time 1.60V 1.67V 1.70V 1.75V 1.80V 1.85V 2MIN 85.8 82.4 80.5 77.2 72.9 68.6 4MIN 64.0 61.6 60.5 57.9 54.8 51.6 5MIN 56.4 54.4 53.3 51.3 48.9 46.5 6MIN 50.8 49.2 48.0 46.4 44.6 42.7 8MIN 43.0 41.8 41.2 39.9 38.3 36.5 10MIN 36.8 35.8 35.2 34.3 32.9 31.6 15MIN 27.1 26.7 26.4 25.7 24.8 23.9 20MIN 21.4 20.9 20.7 20.3 19.9 19.6 30MIN 15.4 15.3 15.2 15.1 14.9 14.7 45MIN 10.9 10.8 10.7 10.6 10.5 10.4 60MIN 8.33 8.29 8.28 8.24 8.20 8.16 90MIN 6.65 6.61 6.58 6.52 6.44 6.36 45MIN 130 129 128 127 126 125 60MIN 100 99.6 99.3 98.9 98.4 97.9 Issued: 90MIN 79.8 79.4 79.0 78.3 77.3 76.4 161101 Constant Power Discharge Characteristics Unit: W (25℃, 77℉) F.V/Time 2MIN 4MIN 5MIN 6MIN 8MIN 10MIN 15MIN 1.60V 1030 768 675 607 511 441 325 1.67V 990 742 651 585 500 430 320 1.70V 969 726 637 573 494 422 317 1.75V 927 695 612 552 479 408 310 1.80V 875 657 585 532 460 393 300 1.85V 824 619 558 513 441 379 290 Please refer to the official site for the lastest rating confirmation. URL: www.csb-battery.com Sales Offices 20MIN 257 251 249 244 239 235 30MIN 185 184 183 181 179 177 Recognized under UL 1989, and certified by ISO 9001, 14001. BUSINESS HEADQUARTERS Tel: +886-2-2880-5600 Fax: +866-2-2888-3300 USA OFFICE Tel: +1-817-244-7777 / 1-(800)3-CSB-USA (272872) Fax: +1-817-244-4445 EUROPE (EMEA) OFFICE Tel: +31(0)180-418-140 Fax: +31(0)180-418-327 TAIPEI OFFICE Tel: +886-2-2880-5600 Fax: +866-2-2888-3300 SHENZHEN OFFICE (CHINA) Tel: +86-755-8831-6488, 8831-6775 Fax: +86-755-8831-6075 SHANGHAI OFFICE (CHINA) Tel: +86-21-5046-1622, 5046-0833 Fax: +86-21-5046-1046 BEIJING OFFICE (CHINA) Tel: +86-10-5820-5336, 5820-5338 Fax: +86-10-5820-3053