A deep cycle battery is defined by what it survives. A starter battery delivers enormous current for seconds and lives its life nearly full; a deep cycle battery is discharged to half its capacity or beyond, recharged, and asked to do it again tomorrow — hundreds of times. The engineering follows: thicker plates, denser active material, separators and case designs chosen for cycling endurance rather than cranking peaks. XD Battery’s lead acid deep-cycling series is built to that brief and feeds the solar, RV, marine and backup applications across this site.
The documented blocks map the common system sizes: the 12V 100Ah deep cycle storage battery (31 kg, 407 × 172 × 240 mm, three-year warranty), the high-capacity 12V 200Ah deep cycle model, and the 12V 250Ah custom-logo deep cycle battery (67 kg, 522 × 268 × 220 mm) for buyers who brand their own line. Gel variants of the same duty live on the gel pages; the deep-cycling discipline is shared.
Deep cycle versus starter battery, in one rule
If the load runs for hours, it is deep-cycle duty; if it runs for seconds, it is starting duty. Running house loads from a starter battery kills it in a season; cranking from a deep-cycle battery disappoints on the first cold morning. Fleets and boats that carry both duties carry both battery types — or a documented dual-purpose compromise, knowingly chosen.
How deep can I discharge them?
Occasional deep discharge is the design duty; routine sizing around 50% depth of discharge is the standard route to long cycle life. The exact cycle expectations for a model are confirmed against its datasheet at quotation.
Are these the same as the gel batteries?
The deep-cycling series and the gel series overlap in duty and differ in electrolyte: gel models immobilise the electrolyte for spill-proof, heat-tolerant service. Both are deep-cycle products.