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605056 3.7V 4000mAh rechargeable Li-polymer Battery

★ Li-polymer High energy density,customizable.

★ 20+ years battery manufacturing experience.

★ High safety: Li-polymer chemistry + automatic production,

★ Long cycle life over 500 times.

★ Wide temperature adaptability, stable from -10℃ to 60℃.

Product Parameters

Product Models

Customization Support

Nominal Voltage	3.7V	Nominal Capacity	4000mAh
Size	6.250.558.5mm	Rough weight	100g
Battery Type	Li-polymer	Cycle life	500 times
Standard charge	0.2C	Max charge	1.0C
Standard discharge	0.2C	Max discharge	1.0C
Charge temperature	0-45℃	Discharge temperature	-10~ +60℃

Product Introduction

The 605056 3.7V 4000mAh rechargeable Lithium Polymer battery delivers high-capacity power in a slim, lightweight form. Utilizing advanced gel polymer electrolyte and flexible aluminum-plastic packaging, it ensures absolute safety with no leakage, fire or explosion risk. This 4000mAh cell offers stable discharge voltage, low self-discharge and 500+ charge cycles. Its high energy density and customizable dimensions make it ideal for devices demanding extended runtime without added bulk, providing consistent, reliable performance for power-hungry portable electronics.

Product Models List

below are some our mature battery cell models.

Model	Battery Material	Capacity	Voltage	Life cycle	Thickness(±0.2)	Width(±0.5)	Length(±0.5)	Weight(g)
HW552535	Polymer	450	3.7V	≥500	5.5	25.0	35.0	10.0
HW503450	Polymer	900	3.7V	≥500	5.0	34.0	50.0	17.2
HW523450	Polymer	1000	3.7V	≥500	5.2	34.0	50.0	18.5
HW603450	Polymer	1000	3.7V	≥500	6.0	34.0	50.0	18.5
HW623255	Polymer	1100	3.7V	≥500	6.2	32.0	55.0	19.0
HW803048	Polymer	1200	3.7V	≥500	8.0	30.0	48.0	25.9
HW354085	Polymer	1300	3.7V	≥500	3.5	40.0	85.0	28.0
HW455060	Polymer	1400	3.7V	≥500	4.5	50.0	60.0	28.3
HW852848	Polymer	1500	3.7V	≥500	8.5	28.0	48.0	29.2
HW603756	Polymer	1500	3.7V	≥500	6.0	37.0	56.0	29.0
HW535056	Polymer	1600	3.7V	≥500	5.3	50.0	56.0	30.5
HW385085	Polymer	1600	3.7V	≥500	3.8	50.0	85.0	30.5
HW405070	Polymer	1620	3.7V	≥500	4.0	50.0	70.0	31.0
HW103450	Polymer	1800	3.7V	≥500	10.0	34.0	50.0	36.0
HW605060	Polymer	2000	3.7V	≥500	6.0	50.0	60.0	43.5
HW754085	Polymer	2700	3.7V	≥500	7.5	40.0	85.0	55.0
HW705060	Polymer	3000	3.7V	≥500	7.0	50.0	60.0	59.5
HW606090	Polymer	4000	3.7V	≥500	6.0	60.0	90.0	77.5

Product Application

This high-capacity 605056 cell excels in demanding applications. It powers tablets, portable power banks and handheld gaming consoles with extended usage time. In medical field, it drives portable patient monitors and infusion pumps where reliability is critical. The battery also supports industrial rugged PDAs, GPS handheld devices and drones, delivering stable power in challenging environments. For smart home devices like robot vacuums and security cameras, it ensures long-lasting operation. This 4000mAh solution combines high energy density with proven safety for next-generation portable electronics.

Product Certification

Howell Li-polymer batteries have been approved by a series of authoritative certificates such as UL, CB, IEC62133, UN38.3, CE, Rohs, Reach, EU, BIS, KC, 3C, BSMI, PSE, CTIA, UKCA, WERCS and so on. All products comply with international and domestic battery industry standards, with reliable quality and complete after-sales guarantee.

Product Shipping

Howell batteries can be used in various electronic products, including industrial products, such as Bluetooth speaker, Auto electronics, GPS, Digital products, Portable DVD, Tablet PC, POS terminal, PDA, Two way radio, Power bank, RC toys, Medical device, Electric bike, Electric scooter, Solar Street Light, Security Products, Solar&wind Energy Storage System, etc.

Move beyond standard batteries that force you to compromise. We specialize in fully customizable battery solutions engineered to fit your exact specifications.

Whether you need a precise form factor to slip into an innovative design, unique voltage and capacity for peak performance, or specialized connectors for seamless integration—we make it possible. From compact wearables to robust industrial equipment, our engineering team collaborates with you to develop a battery that powers not just your device, but your ambition.

Ready to Power Your Unique Project? Contact our technical team today to start your custom battery solution.

Customize your Battery

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