# GEL (Gel battery)

> Lead-acid with gelled electrolyte. Specialised for deep cycle use: boats, mobility scooters, solar systems, caravans.

**Categoría**: Technologies
**URL canónica**: https://baterias.com/gb/battery-glossary/gel
**Idioma**: en-GB

## Definition

A GEL battery is a lead-acid variant in which the electrolyte is mixed with silica to form an immobilised gel. It is a **sealed, spill-proof battery** that tolerates **deep cycling** well (discharges down to 80% of capacity without significant permanent damage), at the cost of lower instant cranking current (reduced CCA compared to an equivalent AGM). It is mainly used in **deep-cycle applications**: leisure marine, electric wheelchairs, solar systems, UPS back-up and caravans. Typically tolerates several hundred cycles at 50% depth of discharge. NOT recommended for pure starting use in automotive (use AGM or EFB instead). Reference GEL brands: Sonnenschein (Exide), Victron Energy GEL, Trojan, Mastervolt.

## See also

- [AGM (Absorbent Glass Mat)](https://baterias.com/gb/battery-glossary/agm)
- [Deep cycle](https://baterias.com/gb/battery-glossary/deep-cycle)
- [Lead-acid battery](https://baterias.com/gb/battery-glossary/lead-acid)

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