Shenzhen BAK Technology Co., Ltd.
                                                                                                           
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24 Years
Since 2002
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BAKTH-521259, 3.7 V, 330 mAh, 1.22 Wh

Price Negotiable
Price: US$3.85
MOQ: 2PCS
Delivery Time: 15~20days
Brand: BAKTH
Product Description
Product Overview:
BAKTH-521259‌ is a ‌3.7V, 330mAh, 1.22Wh lithium-polymer battery pack‌ engineered for compact, low-power electronics, offering stable voltage output and integrated protection circuitry for safe operation in devices like ‌talking pens, voice recorders, and portable LED lights‌.

Description:
Model   NO. BAKTH-521259
Brand Name BAKTH / Neutral / OEM
Compliant   certification standards UN38.3 / RoHS   compliant
Discharging   temperature 0~45
Electrical   Performance
Nominal   Voltage 3.7 V
Nominal   Capacity 330 mAh
Power Capacity 1.22 Wh 
Max. charging   voltage 4.2 V
Cut-off   voltage 2.8 V
Dimension
Length 6mm
Width 13mm
Height 62mm
Weight 7g

 

2. Physical & Safety Features
Constructed in a prismatic or pouch format (dimensions inferred as ~6.0mm × 13mm × 62mm based on model coding), the pack integrates a ‌Protection Circuit Module (PCM)‌ for overcharge, over-discharge, short-circuit, and overcurrent protection. Its lightweight design (~7g) ensure durability in talking pens, voice recorders, and portable LED lights

3. Charging & Maintenance Guidelines

  • Charging‌: Use a balanced Li-ion charger set to 4.2V with CC/CV mode. Recommended charge current: 0.5C–1C.
  • Discharge Cutoff‌: Avoid discharging below to 3.0V to prevent cell damage.
  • Storage‌: Store at 3.7V–3.8V per cell in a cool, dry environment (10°C–25°C).
  • Cycle Life‌: 300–500 cycles at 80% depth of discharge under normal operating conditions.

Get in Touch

Have questions about our products or want to discuss a custom order? Our team is ready to help you.

Company Shenzhen BAK Technology Co., Ltd.
Location RM 2201, Longshenghengbo Center, Jianshe East Road and Bulong Road Intersection, Longhua District, Shenzhen, Guangdong, China
Contact Person Dong

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