Polymer Li-Ion Battery 3.7V 350mAh 421039 (39x10x4.2mm, 2-Wire)
Prices updated: 13 Oct 2026
Compare prices
| Store | product | Price | View in store |
|---|---|---|---|
 Microohm | Polymer Li-Ion Single Cell Battery 3.7V 350mAh 39*10*4.2mm 421039 2 wire | 90 EGP125 | View in store |
Price history
Lowest daily price, last 90 days
Lowest price recorded: 90 EGP
About this product
A single-cell Polymer Li-Ion battery rated 3.7V and 350mAh, in a 39x10x4.2 mm flat pouch with two wire leads. It is suited to projects that need a longer runtime in a slim form factor, such as portable sensors and small wearables.
Specifications
- Nominal voltage
- 3.7V
- Capacity
- 350mAh
- Dimensions
- 39x10x4.2 mm
- Chemistry
- Li-Ion Polymer (single cell)
- Leads
- 2 wire
Frequently asked questions
What is the price of Polymer Li-Ion Battery 3.7V 350mAh 421039 (39x10x4.2mm, 2-Wire) in Egypt?
Polymer Li-Ion Battery 3.7V 350mAh 421039 (39x10x4.2mm, 2-Wire) currently costs 90 EGP in Egypt.
Where can I buy Polymer Li-Ion Battery 3.7V 350mAh 421039 (39x10x4.2mm, 2-Wire) in Egypt?
Polymer Li-Ion Battery 3.7V 350mAh 421039 (39x10x4.2mm, 2-Wire) is available from Microohm. Compare the offers above to find the best price.
How do I wire it to a charger?
Connect the red lead to the battery positive (+) input and the black lead to negative (-) on a 1S Li-Po charger. Confirm polarity with a multimeter before connecting, since reversed polarity can damage the cell.
Is it compatible with a 3.3V microcontroller directly?
A 3.7V nominal cell can power a 3.3V regulator input when it is fully charged or partly discharged, but it must not be discharged too low. Use a protection board and a suitable regulator or LDO to keep the cell in its safe range.
