
What is the BU-201b Gel Lead-Acid Battery?
The early gel lead-acid batteries developed by Sonnenschein (Germany) in the 1950s gained popularity in the 1970s. By mixing sulfuric acid with a silica gelling agent, the liquid electrolyte was transformed into a semi-solid paste, making the gel battery maintenance-free. In the early 1980s, AGM technology emerged, offering similar performance