{"product_id":"tykool-u1-lithium-riding-mower-battery-u1-s-400-400a-cca-8ah-smart-bms-soc-display-u1","title":"TYKOOL U1 Lithium Riding Mower Battery U1-S-400 — 400A CCA, 8Ah, Smart BMS \u0026 SOC Display (U1 [+ -])","description":"\u003cp\u003e\u003cstrong\u003eTYKOOL U1-S-400 is a drop-in U1 lithium replacement battery delivering 400A starting power, a smart SOC display, and long-life LiFePO4 reliability for compatible riding mowers and tractors.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf you maintain a John Deere, Cub Cadet, Craftsman or similar residential riding mower that uses a U1 group battery, the TYKOOL U1-S-400 offers a modern lithium alternative built for frequent starts, long seasonal storage, and less maintenance than lead-acid cells. This model combines high cold-cranking capability with a built-in Smart BMS and real-time voltage\/SOC readout so you can assess readiness at a glance.\u003c\/p\u003e\n\n\u003ch3\u003eHow much starting power and runtime does this battery provide?\u003c\/h3\u003e\n\u003cp\u003eThe U1-S-400 delivers 400 amps of cold-cranking current suitable for most residential riding mower engines and a usable 8 Ah capacity in a compact U1 footprint. That cold-start capability helps ensure reliable ignition after idle periods, and the LiFePO4 chemistry sustains performance across many deep cycles.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e400A Cold Cranking Amps (CCA) for dependable engine starts\u003c\/li\u003e\n  \u003cli\u003e8 Ah nominal capacity in U1 group size (7.6 x 4.8 x 6.9 in)\u003c\/li\u003e\n  \u003cli\u003eAutomotive-grade LiFePO4 cells for stable voltage delivery\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill it fit my mower and what electrical requirements should I check?\u003c\/h3\u003e\n\u003cp\u003ePhysically designed to replace U1 batteries such as 725-1707D and U1-9, the TYKOOL U1-S-400 uses the [+ -] terminal orientation common to that group. Important: do not use this battery with mowers that require different chemistry or unregulated alternator voltages—confirm your machine’s charging output before installation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSize: 7.6 x 4.8 x 6.9 inches — fits U1 compartments\u003c\/li\u003e\n  \u003cli\u003ePolarity: [+ -] terminal arrangement\u003c\/li\u003e\n  \u003cli\u003eCompatibility note: replaces 725-1707D and U1-9, NOT 725-17335\u003c\/li\u003e\n  \u003cli\u003eRequires a regulated charging system rated 13.8–14.6 V\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat safety and durability features are built into the battery?\u003c\/h3\u003e\n\u003cp\u003eThis battery includes a multi-layer Smart BMS and a fire-retardant enclosure to manage charge cycles and reduce risk in demanding conditions. The assembly is IP66-rated for dust and water resistance, and the V0 flame-retardant casing adds an extra level of protection in a workshop or outdoor environment.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSmart BMS with overcharge, short-circuit and thermal protections\u003c\/li\u003e\n  \u003cli\u003eIntegrated LCD shows voltage and state-of-charge (SOC)\u003c\/li\u003e\n  \u003cli\u003eIP66 weatherproofing and V0-rated flame-retardant housing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this battery perform across seasons and over time?\u003c\/h3\u003e\n\u003cp\u003eLiFePO4 cells have low self-discharge, so the U1-S-400 holds charge well during winter storage and seldom needs a trickle charger when disconnected. Designed for long service life, it delivers thousands of deep cycles, which reduces the frequency of replacements compared with conventional lead-acid batteries.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUltra-low self-discharge ideal for seasonal mowers\u003c\/li\u003e\n  \u003cli\u003eOver 3,000 deep cycles and up to a decade of service life under normal use\u003c\/li\u003e\n  \u003cli\u003eMaintenance-free operation—no acid, no corrosion, no watering\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The TYKOOL U1-S-400 suits homeowners and small-property caretakers who need a compact, maintenance-free battery that swaps into U1 compartments and tolerates seasonal storage. It’s aimed at users of John Deere, Cub Cadet, Craftsman and similar riding mowers and tractors that accept a regulated 13.8–14.6 V charging system. If you require a long-lasting, weatherproof, and safer lithium alternative to AGM or flooded lead-acid batteries, this model is tailored to that use—just confirm fit and charging compatibility before purchase.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can TYKOOL U1-S-400 replace a lead-acid U1 battery directly?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes for physical fit and polarity (U1, [+ -]) if your mower’s charging system is regulated to 13.8–14.6V. Verify model compatibility first.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need a special charger or maintenance?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No special maintenance; requires a regulated alternator\/charger within 13.8–14.6V. No trickle charging needed during seasonal storage.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"TYKOOL","offers":[{"title":"Default Title","offer_id":56805592367444,"sku":"B0DK1M4V8B","price":200.84,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/tykool-u1-s-400-front-view.jpg?v=1786807152","url":"https:\/\/gardenluxe.co.uk\/products\/tykool-u1-lithium-riding-mower-battery-u1-s-400-400a-cca-8ah-smart-bms-soc-display-u1","provider":"Gardenluxe Uk","version":"1.0","type":"link"}