EFFEKTA® batteries, BTL series The batteries from the EFFEKTA® BTL series are designed to meet the toughest demands for longevity and reliability. They have a life expectancy of up to 10 years. EFFEKTA® batteries are modern AGM batteries (Absorbent Glass Mat). The electrolyte is bound in a fibreglass mat, resulting in low self-discharge. The batteries only need recharging every six months, provided they are not stored at temperatures above 20°C. AGM batteries are leak-proof and can be installed virtually anywhere. Features https://elecena.pl/product/27806443/btl-12-55l-rechargeable-agm-battery-12-v-55-ah 2025-02-07 https://elecena.pl/product/27806443/btl-12-55l-rechargeable-agm-battery-12-v-55-ah 2025-04-06