Plug-and-Play Footwear Match: Perfectly replicates standard 80x55x10mm dimensions with 55g ultra-lightweight for seamless shoe heel or insole replacement.
IPX7 Washable Waterproofing: Sealed with a flexible matte black TPU casing and silicone ring, surviving deep snow soaking and machine washing.
Smart App & Temperature Sync: Built-in I2C communication protocol paired with NTC 10K thermistors for real-time app telemetry and 3-level heating management.
Mass-produced 7.4V LiPo solutions engineered for extreme -20°C environments. Zero winter supply chain risks.
❖ Engineering Safety into Extreme Cold Footwear: The Battery Expert's Perspective
When designing power for winter ski boots or polar work shoes, a battery is not just a component; it is a safety commitment in a -20°C blizzard. At HIMAX, we built this 7.4V nominal LiPo battery pack around the industry-standard 755060 cell in a 2S1P configuration. By selecting premium, fresh A-grade cells, we ensure that the internal resistance stays under 60mΩ per cell, preventing sudden voltage drops in freezing conditions. Wrapped in a flame-retardant PVC inner barrier and a matte black TPU flexible outer shell, this 55g pack fits comfortably into insoles or heels without causing discomfort. It delivers a stable 2.5A continuous discharge to power up to 18W heating systems effortlessly, keeping your users safe and warm when they need it most.
❖ Flawless Integration & Certified Reliability: Production Line to Global Markets
As footwear manufacturing professionals, we know that assembly efficiency and market compliance can make or break a product launch. This power pack comes equipped with a secure Molex Mini-Fit 8-Pin locked connector to eliminate accidental foot-stomp disconnections, along with a secondary Type-C port for everyday charging convenience. Our integrated 2S smart BMS communicates through the I2C protocol, translating live temperature and capacity telemetry straight to your user’s smartphone app. Manufactured in our ISO9001 certified facility, every single batch undergoes 100% factory inspection—including IPX7 waterproofing checks and 1200-cycle bend tests—fully meeting IEC 62133, UL2054, and GB 31241 compliance requirements. With our UN38.3 certification ready for global shipping, this supply-chain-stable solution is optimized to secure your brand’s presence on Amazon or global retail shelves without missing peak season demands.
Specifications
7.4V 2500mAh 755060 2S1P LiPo Battery Pack
Battery Chemistry Type
Lithium Polymer / LiPo
Core Cell Model
755060 (High Capacity Soft Pouch)
Circuit Configuration
2S1P (2 Cells in Series, 1 in Parallel)
Nominal Voltage
7.4V (Tolerance plus or minus 0.05V)
Maximum Charge Voltage
8.4V (Tolerance plus or minus 0.05V)
Cut-off Discharge Voltage
6.0V (3.0V per single cell threshold)
Rated Battery Capacity
2500mAh (0.2C discharge to 6.0V)
Nominal Rated Energy
18.5Wh
Single Cell Internal Resistance
Less than or equal to 60mOhm
Total Pack Internal Resistance
Less than or equal to 140mOhm
Overcharge Protection Threshold
8.5V (Tolerance plus or minus 0.05V)
Overdischarge Protection Threshold
5.0V (Tolerance plus or minus 0.05V)
Overcurrent Protection Threshold
10.0A (Tolerance plus or minus 0.3A)
Integrated Thermal Sensor
NTC 10K Thermistor Embedded
High Temperature Discharge Cut-off
Power cut-off at 70 degrees Celsius
Primary Power Output Port
Molex Mini-Fit 8-Pin with Positive Lock
Auxiliary Charging Port
Side-mounted Waterproof Type-C Female Port
Communication Protocol
I2C Protocol (Capacity and Temp Telemetry)
Factory Quality System
ISO9001 Certified Manufacturing
Enclosure Packaging Material
Inner Flame-Retardant PVC plus Outer Matte TPU
Frequently Asked Questions
Finding the balance between thinness, waterproof reliability, and certification safety is the biggest challenge when choosing a wearable footwear battery. To help engineering and purchasing teams make informed decisions, our technical team has compiled answers to the most common integration queries we receive from global shoe brands.
How does this battery handle the high peak currents needed when first turning on a heated shoe?
Heated footwear often requires an initial high-temperature boost to warm up. Our 755060 2S1P pack supports a 5A peak discharge current for up to 10 seconds (triggered up to 30 times daily). This is regulated by our custom 2S hardware BMS, ensuring immediate warmth without triggering false over-current shutdowns.
Will the battery lose capacity quickly if consumers use their heated boots heavily every winter?
No. Built with high-capacity premium cells, the battery pack achieves a long cycle life of 650 cycles or more at 80% DOD (Depth of Discharge). Even after long-term storage, its calendar life is highly stable, with a capacity degradation of 20% or less over 2 years at room temperature, making it durable for multiple winter seasons.
What safety measures prevent the battery from overheating or overcharging inside a sealed shoe compartment?
Safety is our top priority. The integrated BMS provides fivefold hardware protection with fixed self-recovering safety thresholds: overcharge protection at 8.5V, overdischarge protection at 5.0V, and a strict over-current cut-off at 10A. Additionally, an NTC 10K thermistor shuts off power immediately if discharge temperatures exceed 70°C or charging temperatures cross 60°C.
How does the charging protocol work, and do our customers need a specialized adapter?
No specialized adapters are needed. While the main output uses a locked Molex 8-Pin connector, the pack features a side Type-C port that accepts standard 5V/2A smartphone chargers. It follows a standard Constant Current to Constant Voltage (CC/CV) charging curve up to a maximum 8.4V, automatically cutting off when the current drops to 20mA or less.
Is this battery package fully certified for cross-border e-commerce sales on platforms like Amazon?
Yes. The battery is fully UN38.3 certified for global sea and air freight logistics, and our production plant operates under a certified ISO9001 quality system. The performance parameters and safety metrics are fully designed to comply with IEC 62133, UL2054, and GB 31241 standards, helping your finished heated shoes smoothly pass customs and international platform compliance audits.
