Why Your 100Ah Lead-Acid Is Really a 50Ah Battery

The WNRLN MR-12100-LFP 12V 100Ah LiFePO4 Marine Battery delivers 90Ah of usable energy — 80% more runtime for your trolling motor, fish finder, and onboard electronics.

The Lead-Acid Problem

• 50% Usable Capacity: A 100Ah lead-acid battery can only be discharged to 50% before voltage collapse — effectively a 50Ah battery
• Voltage Sag: Below 50% charge, trolling motor thrust fades and electronics flicker
• Off-Season Death: Lead-acid sulfates during winter storage — lithium self-discharges under 2% per month
• Weight Penalty: 100Ah lead-acid weighs 28-32 kg vs 12.5 kg for lithium — 2.5x heavier

Why WNRLN MR-12100-LFP

• 90Ah Usable from 100Ah Rating: LiFePO4 allows 90% depth of discharge — 80% more runtime than lead-acid
• 5,000+ Deep Cycles: At 50 fishing trips per year, this battery outlasts your boat
• IP67 Fully Sealed: Submersion-rated marine-grade aluminum enclosure with stainless steel terminals
• 4S 100A Smart BMS: Low-voltage cutoff, over-current and short-circuit protection
• ABYC Compliant: Meets American Boat and Yacht Council standards for lithium battery installation

Application Scenarios

Technical Specifications

FAQ

Q: How is 90% usable different from lead-acid?
A: A 100Ah lead-acid battery can only be discharged to 50% (50Ah usable) before voltage drops below 11.5V. The MR-12100-LFP delivers 90Ah usable — effectively 80% more runtime from the same Ah rating.

Q: Can I use this with my existing marine charger?
A: We recommend a 12V 20A LiFePO4 smart charger. Standard lead-acid chargers with desulfation modes can damage lithium cells. Charger add-on: USD 65 with bulk orders.

Q: Warranty?
A: 3-year standard. CE, UN38.3, MSDS certified. ABYC compliant design.

Ready for 80% more fishing time per charge? Contact us for bulk pricing and sample evaluation.

Hunan Chalong Fly Technology Co., Ltd., established in 2018, is a subsidiary of Wuhan Changlong Group dedicated to the field of energy technology. The company integrates R&D, production, and sales, specializing in the innovation and manufacturing of lithium battery packs and solar energy storage products, providing customers with integrated green energy solutions.

The company boasts an experienced and professional R&D team with strong technical expertise in lithium-ion battery systems and solar power products. It possesses robust capabilities for continuous product development and large-scale manufacturing. In the field of lithium battery PACK, CLF has achieved a leading position in China, holding multiple invention and utility model patents. The company has participated in several major national projects, undertaking the development and production of specialized lithium-ion batteries and backup power supplies.

We focus on personalized design and customized manufacturing, having provided numerous domestic and international clients with high-quality, differentiated products and services. All products adhere to strict quality management systems and are supported by comprehensive after-sales service. They have gained widespread recognition and trust from users worldwide in industries such as commercial and industrial energy storage, electric vehicles, mechanical equipment, logistics and transportation, and marine applications.

Adhering to the core values of "Striving for Excellence and Putting People First," the company consistently provides reliable support to sectors including power, telecommunications, military, and new energy vehicles. Moving forward, we will continue to drive product innovation and quality enhancement. Through safer, more reliable, and higher-value performance products, we are committed to promoting the adoption of green energy and building a sustainable future together.