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Shop XS Power at JS Ultimate Sounds — the American brand that dominates car audio electrical, from budget AGM batteries to the lithium titanate banks you see in competition lanes. If your headlights dim on bass hits, this is the section that fixes it.
XS Power AGM Batteries
XS Power AGM batteries are the starting point for most builds: sealed, maintenance-free, and mountable in any orientation. The XP600 is the classic supplemental battery for systems up to roughly 2,000W, while the PSX14L works as an under-hood replacement that helps both audio and starting reliability.
XS Power Lithium & Titan8 LTO
Past about 3,000W, lithium delivers far more usable current per pound. The US1100-31 is a Group 31 lithium built for car audio duty cycles, and the Titan8 lithium titanate (LTO) line — including the PWR-S6-30Q, RSV-S6-30Q and 16V RSV-S7-30 — is the competition standard for extreme current delivery. Check that your amplifiers are rated for 14V or 16V before buying a high-voltage bank.
SuperBank, Terminals & Hardware
Round out the electrical with XS Power SuperBank capacitors and terminals, lugs and hold-downs for secure high-current connections.
Sizing Your Electrical
Not sure which battery your build needs? Our car audio battery guide sizes banks by system wattage, the lithium vs AGM breakdown explains the chemistry trade-offs, and the second battery guide covers safe wiring. Remember: batteries store, alternators supply — big daily builds need charging headroom too.
Why Buy XS Power From JS Ultimate Sounds
Genuine product with warranty support and fast shipping. Read our honest Are XS Power Batteries Good? review, or send us your amp list and we'll size the bank for you.