Replacement Fiamm 12FLX300 Battery 12v Sealed Rechargeable
This 12v high rate valve regulated lead acid battery is a compatible replacement battery for Fiamm 12FLX300 batteries. This battery has up to 10 year design life in standby applications and 308Wpc high rate discharge capabilities make it the ideal choice to replace 12FLX300 batteries in UPS applications
| Chemistry: | Rechargeable Valve Regulated Lead Acid VRLA |
| Nominal Voltage: | 12v |
| Operating Temp Range: | -40 to 149F |
| Discharge Watts per cell @ 25°C 1.67vpc 15min: | 308WPC |
| Terminals: | M6 Insert |
| Dimensions (L x W x H): | 10.20 x 6.61 x 8.37 |
| Weight: | 59.53 lbs |
| Design Life: | 10 years (standby) |
| Case: | UL 94 V-0 Flame Retardant |
Reviews
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May 15, 2026 by Gerald H. (CA, US)
“You tricked me. When I clicked the tab to place the order, the price total was $97.05. This was after shipping and tax was calculated. Then when I actually placed the order, the price was increased by $7.06 and marked as sales tax. Sales tax was already calculated based on zip code.”
May 14, 2026 by Paul W. (WY, US)
“So quick and easy”
May 13, 2026 by Marie Q. (FL, US)
“Fast and easy”

