100Pcs 501884 3.7V 850mAh Li-Polymer Battery with JST-PH 2.0 2-Pin Connector for Smart Watch
$216.00
00Pcs 501884 3.7V 850mAh Li‑Polymer Batteries with JST‑PH 2.0 2‑Pin Connector
This bulk pack includes 100 high‑quality rechargeable lithium polymer cells, model 501884 (5.0×18×84mm). Each battery delivers a nominal voltage of 3.7V and a tested capacity of 850mAh, ensuring long runtime for smart watches and other wearables. The pre‑attached JST‑PH 2.0 (2.0mm pitch) 2‑pin plug allows easy replacement without soldering. All units are grade‑A cells with built‑in protection against overcharge, over‑discharge, and short circuits. Important: Please verify the wire polarity and connector orientation on your original battery before ordering, as different devices may use reverse pin assignments.
Description
Product Overview
This listing offers 100 pieces of 501884 lithium‑polymer (Li‑Po) rechargeable batteries, specifically designed for compact wearable electronics such as smart watches, fitness bands, Bluetooth headsets, portable medical devices, and IoT sensors. Each battery is factory‑fresh, capacity‑matched, and voltage‑sorted for consistent performance in multi‑cell applications.
Key Specifications
| Parameter | Value |
|---|---|
| Model | 501884 |
| Dimensions (Thickness × Width × Length) | 5.0 mm × 18 mm × 84 mm (approx. 0.20″ × 0.71″ × 3.31″) |
| Nominal Voltage | 3.7V |
| Charge Limit Voltage | 4.2V ± 0.05V |
| Discharge Cut‑off Voltage | 2.75V |
| Typical Capacity | 850 mAh (measured at 0.2C discharge rate) |
| Internal Resistance | ≤ 60 mΩ (fresh,出厂状态) |
| Cycle Life | ≥ 500 cycles (retaining ≥80% of initial capacity) |
| Operating Temperature | Charge: 0℃ ~ 45℃ / Discharge: -20℃ ~ 60℃ |
| Storage Temperature | -20℃ ~ 45℃ (recommended storage at 3.7V ~ 3.8V for long term) |
| Connector Type | JST‑PH 2.0 (2.0 mm pitch), 2‑pin male plug, with pre‑soldered wires (approx. 30–50 mm lead length) |
| Protection Circuit | Built‑in PCM (Protection Circuit Module) for over‑charge, over‑discharge, and short‑circuit protection |
Quality & Performance Features
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Grade‑A polymer cells – imported materials ensure high energy density and stable output.
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Strictly matched – all batteries are sorted by capacity, internal resistance, and voltage to guarantee uniformity in the same lot.
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Ready‑to‑use – the JST‑PH connector is already attached, saving you time and soldering effort.
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Safe chemistry – Li‑Po technology offers a lower risk of leakage compared to traditional Li‑ion cylindrical cells.
⚠️ Critical Compatibility Check (Please Read Before Ordering)
Although the connector is physically JST‑PH 2.0 2‑pin, different smart watch brands may adopt different wire polarities (red/black positions) and locking tab directions.
To avoid damaging your device, please confirm the following with your original battery:
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The red wire should normally be positive (+), and black negative (−) – but some manufacturers reverse this. Check your old battery’s wiring.
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The orientation of the plug when inserted (the latch may face up or down) must match your device’s socket.
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If you are unsure, take a clear photo of your original battery’s connector and send it to us – we will help verify compatibility before you place the order.
Package & Warranty
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Packaging: Anti‑static bags with foam padding; 100 pieces per carton (or per bag, depending on shipment).
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Warranty: 30‑day hassle‑free return/replacement for non‑human‑induced quality issues (subject to platform policy).
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All batteries are brand new, genuine capacity – no inflated specifications.
Recommended Charging
For best performance, charge with a CC/CV (constant current / constant voltage) charger at a current not exceeding 0.5C (approx. 425 mA). Never exceed 4.25V during charging.
