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We heard you. Due to overwhelming demand and to ensure none of our community misses out, WattCycle is officially extending our Cyber Monday promotion through Friday, December 5, 2025. This gives you extra time to upgrade your power system with our premium LiFePO4 batteries at our best prices of the year. During this extended sale, enjoy savings of up to $1,000. Plus, unlock an additional 8% off your entire cart at checkout using code "BlackFriday8%"—no minimum purchase required. Rest assured with our 30-Day Price Protection Guarantee: if any item you purchase drops in price within 30 days, we’ll automatically refund you the difference. Pay for Energy, Not Just Specs At WattCycle, we build our batteries around a core principle: you should pay for usable energy (Watt-Hours), not just a capacity rating (Amp-Hours). That’s why we utilize top-tier EV-grade A+ cells and robust Battery Management Systems (BMS) in every product, ensuring long-term performance, safety, and true value across thousands of cycles. Here are the standout deals from our extended promotion: The High-Capacity Choice: Identical Energy, Two Voltage Options For large-scale applications like RVs, off-grid homes, and marine systems, we offer the same massive energy reserve in your preferred voltage. WattCycle 12V 628Ah Battery Promotional Price: $999.99 (was $2,599.99) | After using the "BlackFriday8%" battery coupon code, the price is only $920. Key Specs: 8,038.4Wh of usable energy | 300A BMS | 15,000+ cycle lifespan Perfect For: 12V systems demanding maximum runtime, such as large off-grid solar setups, full-time RV living, or extended marine voyages. Its substantial 8+ kWh capacity reliably powers heavy-duty appliances like air conditioners and large inverters for prolonged periods. Product link: Wattcycle 12V 628Ah Ultra LiFePO4 Battery WattCycle 24V 314Ah Battery Promotional Price: $999.99 (was $1,999.99) | only $920 after "BlackFriday8%" battery coupon code. Key Specs: 8,038.4Wh of usable energy | 300A BMS | 15,000+ cycle lifespan Perfect For: 24V systems requiring high-capacity energy storage. It delivers the same 8 kWh of usable energy as the 12V 628Ah battery at the same price—exemplifying our fair-value philosophy. It is ideally suited for 24V solar integrations, backup power for critical home circuits, large trolling motors, or custom high-power mobile applications. Product link: WattCycle 24V 314Ah Ultra LiFePO4 Battery WattCycle 12V 314Ah Mini Battery Promotional Price: $399.99 (was $629.99) | only $367.99 after "BlackFriday8%" battery coupon code. Key Specs: 4,019Wh of usable energy | 200A BMS | 15,000+ cycle lifespan Perfect For: For those seeking optimal value, this 12V 314Ah Mini battery stands out as the best Wh-per-dollar choice in this Cyber Monday sale. Its 4 kWh capacity is an outstanding match for weekend RV getaways, week-long boating trips, essential home backup (e.g., for refrigeration or pumps), or as a primary/expansion battery for over landing and van life builds, offering an ideal balance of size, power, and price. Product link: WattCycle 12V 314Ah Mini battery Secure Your Power Upgrade Today This extended window is your final opportunity in 2025 to invest in durable, high-performance energy storage at significant savings. Choose the WattCycle battery that aligns with your energy needs and system voltage. Sale Ends: Friday, December 5, 2025, at 11:59pm. Shop and using your coupon code "BlackFriday8%" at checkout to save.

WattCycle battery Black Friday deals start on Nov 5 to Nov 28. Offering up to 60% off for LiFePO4 batteries plus an additional 8% code when you subscribe. Visit the WattCycle black Friday sale special page for daily flash sale times. It’s perfect timing to lock in Black Friday battery deals before holiday trips. Get your additional Battery Coupon Code: BlackFriday8% Enter the battery coupon code to receive an additional 8% discount at checkout. At-a-glance Deal Highlights Quick snapshot: WattCycle Black Friday batteries event runs Nov 5–Nov 28. Offer up to 60% off for LiFePO4 batteries, ideal for anyone hunting black Friday battery deals. Double and triple points: Earn 2X Wattpoints during the sale and 3X on Black Friday (on Nov 28). Points are redeemable for coupons, batteries, and limited rewards. Instant signup bonus: Subscribe by email for an immediate 8% code and a free spin on the Lucky Wheel. Lucky Spin wheel: Win batteries (12V 8Ah, 20Ah, 50Ah), monitors, or 8%–10% discount codes. Accessories clearance: All accessories are 15% off during the event, include fuses, switches, monitors, and lithium battery chargers. Flash sales: Daily timed flash deals offer the year’s lowest guaranteed prices on selected items; stock is limited. Extended Cyber Monday window: Nov 28–Dec 1 brings restocks and extra accessory bundles to help finish your energy system. Price protection: A 30-day price protection policy ensures you lock in the best price or receive an adjustment. How Wattpoints work and how to get the most value Wattpoints is WattCycle member point rewards currency you earn with each order. During the Black Friday window you get 2X points, and on Black Friday purchases get 3X. Points are redeemable for discount coupons, replacement batteries, or limited rewards such as a limited edition WattCycle T-shirt valued at $189, a baseball bat valued at $159, a 200A fuse, or a 500A monitor. Lucky Spin wheel Signing up gets you an instant 8 percent discount and entry to the Lucky Spin wheel. Prizes include LiFePO4 lithium batteries such as 12V 8Ah, 12V 12Ah, 12V 20Ah, and 12V 50Ah batteries, monitors, plus 8% or 10% discount codes. Coupons won on the wheel typically have long validity and can be used later or gifted. Use any spin prize as a way to cover shipping or a small accessory so your main battery purchase keeps its coupon. Even modest wins add up when combined with Wattpoints and accessory discounts. Recommended Accessories Discount Sale Accessories are 15% off during the main event, which is the fastest way to finish a system affordably. The sale covers fuses, switches, circuit breakers, monitors, lithium chargers, and mounting kits. Suggested bundles to consider: Marine starter kit: 200A/250A fuse ($15.99), 14.6V 20A LiFePO4 battery charger ($109.99), 12V 100Ah BT trolling motor battery ($199.99) to get a simple 12V install. RV essentials: 200A battery switch ($39.99), charger, 500A LiFePO4 battery monitor ($79.99) and 12V 100Ah Group 24 battery ($169.99) for reliable on-road power. Solar backup pack: 14.6V 40A LiFePO4 battery charger ($159.99), 30A MPPT solar charge controller ($119.99), 500A LiFePO4 battery monitor ($79.99) and 12V 314Ah Mini battery (399.99) to pair with your solar system. Buying compatible accessories during the event reduces troubleshooting later and often costs less than purchasing items singly after the season ends. Lowest Price Guarantee WattCycle offers 30 days price protection policy during the promotion. All user are covered by a 30-day price protection policy to ensure they secure the best available price during the promotion. Get Your Discount Now Earn 2X Wattpoints during Nov 5 to Nov 28 and get 3X points on Black Friday to stack further discounts. For product-specific flash sale times and exact listings, visit the official WattCycle US site. Whether you need a 12 volt marine deep cycle battery, a modular pack for solar backup, or an RV and camper van 100Ah battery, the event makes it easier to complete your setup affordably and with confidence.

The behaviour is the expected result of deliberate BMS protection logic (designed to protect individual cells) interacting with parallel system electrical conditions.

For boat owners and professionals alike, understanding ABYC E-13 is the first step toward safer, more reliable systems. When batteries and their associated equipment are designed and installed to E-13 principles, the likelihood of catastrophic failure is reduced and the overall dependability of the vessel’s electrical system improves—protecting people, craft, and gear.

From August 11–31, 2025 (PDT), WattCycle’s 3rd Anniversary delivers significant savings and engagement opportunities for you: enjoy 6% off sitewide, tiered order discounts up to $160, graduated multi-item price reductions (up to 20% on additional batteries), and 20% off qualifying chargers with multi-pack purchases.

As part of our member-only privileges, every purchase earns double Wattpoints, accelerating your rewards and future savings. Mark your calendar now and prepare to upgrade your power system with WattCycle’s most significant reductions to date.