HIFIDECKY 7.4V 3000mAh Li‑Polymer Battery Pair for Heated Gloves & Socks — Female DC Jack, Protection Circuitry

HIFIDECKY rechargeable 7.4V 3000mAh Li‑Polymer battery pair powers heated gloves, socks and hats with built‑in safety protections and a female DC jack for easy connection.

These two replacement batteries are designed to fit heated apparel that uses a female DC jack (3.5mm outer / 1.35mm inner). Each Li‑Polymer cell delivers nominal 7.4 volts and a practical 3000mAh capacity (specified as 3500mAh nominal in some references), giving extended run time compared with smaller packs. They include protection circuitry against short circuits, overcharge and overdischarge, and are recommended for users who want reliable warm power for seasonal outdoor use. Note: chargers are not included in the package.

How long will these batteries keep my heated gear warm?

Run time depends on the heat setting of your garment and the load of the heating elements. On moderate settings you can expect substantially longer operation compared with typical lower‑capacity packs; higher heat settings shorten runtime proportionally.

• Rated capacity: 3000mAh (manufacturer notes 3500mAh capacity specification in some documentation).
• Typical charge cycles: 500–600 full charge/discharge cycles.
• Charge time: approximately 3–4 hours at the recommended current.
• Higher heat settings reduce run time; lower settings extend it.

Are these batteries safe to use with heated clothing?

Yes — each pack contains an internal protection IC that helps prevent overcharging, overdischarging and short circuits, and the specified charging/discharging voltage ranges keep operation within safe limits. Still, follow normal battery care: avoid crushing, expose to excessive heat, or placing on flammable surfaces while charging.

• Rated voltage: 7.4V; charging voltage: 8.4V.
• Protection features: overcharge, overdischarge and short‑circuit safeguards.
• Operating temperature: charging 0°C to 45°C; discharging -20°C to 60°C; storage -20°C to 35°C.
• Charge currents: standard 0.5C and fast 1.0C supported (use compatible charger).

How do I charge and connect these Li‑Polymer packs to my garments?

The packs use a female DC jack (3.5mm outer / 1.35mm inner) to mate with most heated apparel plugs. Use a compatible charger (not included) that matches the 8.4V charging requirement and observe the recommended charging current to preserve cycle life.

• Connector type: female DC jack, 3.5mm outer diameter, 1.35mm inner diameter.
• First use: fully charge before initial operation for best performance.
• Maintenance: if unused for long periods, charge and discharge once every three months.
• Charger: sold separately — match voltage and current specs to avoid damage.

What precautions should I take when using or storing these batteries?

Handle these Li‑Polymer packs with the same care you would any rechargeable battery: keep them away from extreme heat, avoid puncture or crushing, and remove them from garments before washing. Always charge on a non‑flammable surface and do not leave charging batteries unattended for long periods.

• Keep away from fire, excessive heat and flammable materials while charging.
• Do not crush, puncture or short the terminals; avoid metal contacts during storage.
• Remove batteries before laundering heated apparel.
• Store between -20°C and +35°C for optimal shelf life.

Who is this for? These HIFIDECKY 7.4V 3000mAh Li‑Polymer batteries are intended for outdoor enthusiasts, commuters and workers who use battery‑heated gloves, socks, hats or similar garments and need a dependable two‑pack spare solution. They suit anyone seeking longer run time, built‑in protection circuits and a standard female DC jack interface — ideal as a replacement or backup when you don’t want to be limited by lower‑capacity batteries. If you need a charger, purchase a compatible 8.4V charger separately and follow the listed charging specifications.