High Quality 3.87V 5500mAh/21.285Wh ULEFONE 5021 Battery For Ulefone PHONE

Do you want to buy a cheap ULEFONE 5021 Compatible battery? We offer you a cheap ULEFONE 5021 Compatible battery - an incredibly high quality Compatible battery! All ULEFONE 5021 are brand new,1 year Warranty, 100% Guarantee Quality and Fully Test!

✔ Battery for 5021 Ships to Singapore

Product Overview

This battery is suitable as a replacement battery for Ulefone PHONE battery and ULEFONE 5021 model.

High capacity ULEFONE 5021 battery for longer standby time.

The battery is professionally tested to ensure the best lifespan.

1 year warranty, 30 days money back, 100% brand new!

Battery capacity (mAh/A/W) may be different; the more mAh/A/W it displays, the higher its autonomy.

Safety certified CE / FCC / RoHS.

Key Features

• High‑capacity design with 5500mAh/21.285Wh for extended device runtime.
• Stable 3.87V output ensures consistent performance during daily use.
• Built with high‑quality lithium‑ion cells for improved durability and long cycle life.
• Advanced protection system including overcharge, over‑discharge, overheat, and short‑circuit safeguards.
• Optimized for reliable performance in warm and humid environments.
• Lightweight and compact design for easy installation and device compatibility.

Technical Specifications

Model	5021
Battery Condition	Brand New Replacement Battery
Item Code	2504BA0810M_Te
Category	Smartphone Batteries
Brand	ULEFONE
Capacity	5500mAh/21.285Wh
Voltage	3.87V
Type	Li-ion
Color	Black
Size	*mm(L x W x H)
Applies to	Ulefone PHONE
Certification	Passed CE, UL, ROHS, ISO 9001/9002 and GS certification
Service	Buy now, we promise a one-year warranty and 30-day returns

Compatible Models

Replacement Part Numbers:

• 5021

Compatible Models：

For Ulefone PHONE

* Please make sure that the replacement battery you are buying is suitable for your device brand and model.

Battery Care & Maintenance

• Store the battery in a cool, dry environment to maintain long‑term performance.
• Avoid exposing the battery to excessive heat or direct sunlight, especially in warm and humid climates.
• Use compatible ULEFONE chargers or certified charging accessories to ensure safe and efficient charging.
• Avoid frequent full discharges; partial charge cycles help extend overall battery lifespan.
• If the battery will not be used for an extended period, keep it at around 40–60% charge before storage.
• Clean the battery contacts periodically with a dry cloth to maintain stable power delivery.
• Do not puncture, crush, or expose the battery to water or high humidity.

Frequently Asked Questions