2 pcs. Astrolux E2145 4500mAh 28A 3.7V 21700 Battery Unprotected ($20.46)

Today’s best deal: $20.46 found on Banggood. Quick Discharge Current 20000mA (5.0C5rate), Quick Charge Current 4000mA (1.0C5rate), Nominal voltage 3.7V, Operating temperature “Charging: 0℃~45℃
Discharging: -20℃~60℃”, Weight Approx: 70±2g, Storage Humidity ≤75% RH, Storage temperature -5℃~35℃, Net weight 70±2g, Standard Discharge CC /0.2C5A / 3.00V, End-of-charge Current 0.02C5A (At CV mode), End-of-charge Voltage 4.20±0.05V, Standard Charge CC/CV /0.2C5A / 4.20V, Typical Capacity 4530mAh @ 0.2C Discharge, Minimum capacity 4500mAh @ 0.2C Discharge, Maximum instantaneous pulse discharge current 28000mA (7.0C5rate), Item Astrolux® E2145 4500mAh 28A 21700 Li-ion Battery, Initial Impedance Max: 20mW, End-of-discharge Voltage 3.00 V, Size / Length 71±0.6mm, Charging Time 8.0hours(standard charge), Size / Diameter 22±0.5mm.
Updated: 26-08-2025

best price,2,pcs.,astrolux,e2145,4500mah,28a,3.7v,21700,battery,unprotected,discount

Banggood

Warehouse in China.
Link: 2 pcs. Astrolux E2145 4500mAh 28A 3.7V 21700 Battery Unprotected
Price: $20.46

Additional Banggood coupons:
1. First page
2. Second page

Other warehouses/versions

This item is available in 1 another warehouse/version!
1. Europe2 pcs. Astrolux E2145 4500mAh 28A 3.7V 21700 Battery Unprotected [EU] ($-3)

Aliexpress

There’re some similar (or not) items on Aliexpress

Image Product (link) Price Coupons
TDA1517P 2.1 Super Bass Mini Micro 3 CH Power Amplifier Board 6W+6W+25W HIFI Class D Digital Power Amplifier Module TDA1517P 2.1 Super Bass Mini Micro 3 CH Power Amplifier Board 6W+6W+25W HIFI Class D Digital Power Amplifier Module $3.13
TDA1517P 2.1 Super Bass Mini Micro 3 CH Power Amplifier Board 6W+6W+25W HIFI Class D Digital Power Amplifier Module TDA1517P 2.1 Super Bass Mini Micro 3 CH Power Amplifier Board 6W+6W+25W HIFI Class D Digital Power Amplifier Module $4.63
DC8-24V 50W*2+100W Stereo Dual Channel Amplifier Board TPA3116 Class D 2.1 Channel Audio Amplifier Module 4Ω 50W 8Ω 30W 2Ω 100W DC8-24V 50W*2+100W Stereo Dual Channel Amplifier Board TPA3116 Class D 2.1 Channel Audio Amplifier Module 4Ω 50W 8Ω 30W 2Ω 100W $5.59
TPA3116D2 50W*2 +100W 2.1 Channel Digital Subwoofer Power Amplifier Board TPA3116*2 3 Channels DC 12-24V TPA3116D2 50W*2 +100W 2.1 Channel Digital Subwoofer Power Amplifier Board TPA3116*2 3 Channels DC 12-24V $5.66
ZK-MT21 2x50W+100W 2.1 Channel Subwoofer Digital Power Amplifier Board Audio Stereo BT5.0 Bass Am for Home Theater Speaker ZK-MT21 2x50W+100W 2.1 Channel Subwoofer Digital Power Amplifier Board Audio Stereo BT5.0 Bass Am for Home Theater Speaker $6.44
YS-AP50L 50W+50W 2.1 Channel Subwoofer Digital Power Amplifier Board Bluetooth 5.1 Stereo AMP Amplificador 12V 24V 3.5mm AUX USB YS-AP50L 50W+50W 2.1 Channel Subwoofer Digital Power Amplifier Board Bluetooth 5.1 Stereo AMP Amplificador 12V 24V 3.5mm AUX USB $7.51
ZK-MT21 2x50W+100W 2.1 Channel Bluetooth 5.0 Subwoofer Digital Power Amplifier Board AUX 12V 24V Audio Stereo Bass Amp for Home ZK-MT21 2x50W+100W 2.1 Channel Bluetooth 5.0 Subwoofer Digital Power Amplifier Board AUX 12V 24V Audio Stereo Bass Amp for Home $7.88
ZK-MT21 2x50W+100W 2.1 Channel Bluetooth 5.0 Subwoofer Digital Power Amplifier Board AUX 12V 24V Audio Stereo Bass Amp for Home ZK-MT21 2x50W+100W 2.1 Channel Bluetooth 5.0 Subwoofer Digital Power Amplifier Board AUX 12V 24V Audio Stereo Bass Amp for Home $9.43
WOOPKER ZK-MT21 Sound Amplifier Module 2x50W+100W 2.1 Channel Subwoofer Bluetooth 5.0 Digital Power Amplifier Board AUX 12V/24V WOOPKER ZK-MT21 Sound Amplifier Module 2x50W+100W 2.1 Channel Subwoofer Bluetooth 5.0 Digital Power Amplifier Board AUX 12V/24V $11.19
2.1 Channel 50W*2+100W Bluetooth 5.1 TPA3116 HIFI Audio Power Amplifier Board Module High And Low Subwoofer Home Theater Speaker 2.1 Channel 50W*2+100W Bluetooth 5.1 TPA3116 HIFI Audio Power Amplifier Board Module High And Low Subwoofer Home Theater Speaker $11.20
ZK-TB21 2x50W+100W 2.1 Channel Digital Power Amplifier Board AUX Bluetooth-compatible Audio Stereo Subwoofer Amplificador Module ZK-TB21 2x50W+100W 2.1 Channel Digital Power Amplifier Board AUX Bluetooth-compatible Audio Stereo Subwoofer Amplificador Module $11.42
ZK-MT21 Bluetooth-compatible 2.1 Channel Bass Power Subwoofer Amplifier Board AUX 12V 24V Audio Stereo for Home Theater Speaker ZK-MT21 Bluetooth-compatible 2.1 Channel Bass Power Subwoofer Amplifier Board AUX 12V 24V Audio Stereo for Home Theater Speaker $11.44
ZK-HT21 ZK-MT21 160Wx2+220W 50Wx2+100W Bluetooth Digital Power Amplifier Audio Power Amplifier 2.1 Channel TDA7498E Module ZK-HT21 ZK-MT21 160Wx2+220W 50Wx2+100W Bluetooth Digital Power Amplifier Audio Power Amplifier 2.1 Channel TDA7498E Module $11.97
ZK-HT21 2.1 Channel TDA7498E 160Wx2+220W Bluetooth-compatible Digital Power Amplifier Module High And Low Tone Subwoofer ZK-HT21 2.1 Channel TDA7498E 160Wx2+220W Bluetooth-compatible Digital Power Amplifier Module High And Low Tone Subwoofer $13.90
1-10pcs 2.1 Channel Subwoofer Digital Power Amplifier Board ZK-MT21 2x50W 100W AUX 12V 24V Audio Stereo Bluetooth 5.0 Bass Amp 1-10pcs 2.1 Channel Subwoofer Digital Power Amplifier Board ZK-MT21 2x50W 100W AUX 12V 24V Audio Stereo Bluetooth 5.0 Bass Amp $14.31
2.1 Channel Bluetooth-Compatible Audio Power Amplifier Module 50Wx2+100W Amplifier Board for DIY BT Audio and Store Home Theater 2.1 Channel Bluetooth-Compatible Audio Power Amplifier Module 50Wx2+100W Amplifier Board for DIY BT Audio and Store Home Theater $14.79
ZK-MT21 Bluetooth-compatible 2.1 Channel Bass Power Subwoofer Amplifier Board ZK-MT21 Bluetooth-compatible 2.1 Channel Bass Power Subwoofer Amplifier Board $15.74
TPA3116D2 DC10-25V Hifi Digital Audio Amplifier Board 50W*2+100W High Power 2.1 Channel Subwoofer With Extension Cable TPA3116D2 DC10-25V Hifi Digital Audio Amplifier Board 50W*2+100W High Power 2.1 Channel Subwoofer With Extension Cable $16.85
M18K-Audio Amplifier Board 2.1 Channel 240W High Power Subwoofer Amplifier Board AMP Dual AC18 - 24V Home Theater M18K-Audio Amplifier Board 2.1 Channel 240W High Power Subwoofer Amplifier Board AMP Dual AC18 – 24V Home Theater $22.20
ZK-DAM 220W*2+350W 2.1 Channel Bluetooth Digital Power Amplifier Board TPA3251D2 Subwoofer Bass Tone Audio AMP Module High Power ZK-DAM 220W*2+350W 2.1 Channel Bluetooth Digital Power Amplifier Board TPA3251D2 Subwoofer Bass Tone Audio AMP Module High Power $30.88
TPA3255 Bluetooth-Compatible Bass Audio Amplifier Board 2.1 Channel 220W*2+350W Low Tone Audio APP DC 16-38V TPA3255 Bluetooth-Compatible Bass Audio Amplifier Board 2.1 Channel 220W*2+350W Low Tone Audio APP DC 16-38V $38.07
TPA3255 Bluetooth-Compatible Bass Audio Amplifier Board 2.1 Channel 220W*2+350W Low Tone Audio APP DC 16-38V TPA3255 Bluetooth-Compatible Bass Audio Amplifier Board 2.1 Channel 220W*2+350W Low Tone Audio APP DC 16-38V $41.23
XY-S350H App Control 220Wx2+350W Amplifier 2.1 Dual Channel Wireless Audio Board XY-S350H App Control 220Wx2+350W Amplifier 2.1 Dual Channel Wireless Audio Board $43.94
XY-S350H 2x220W+350W 2.1 Dual Channel Digital Power Amplifier Board AUX USB Audio Stereo Subwoofer Amplificador Wireless Module XY-S350H 2x220W+350W 2.1 Dual Channel Digital Power Amplifier Board AUX USB Audio Stereo Subwoofer Amplificador Wireless Module $51.40
5-Channel Digital Power Full Amplifier 600W Black Bluetooth Stereo HiFi Audio USB Aluminum Alloy With Remote Control 5-Channel Digital Power Full Amplifier 600W Black Bluetooth Stereo HiFi Audio USB Aluminum Alloy With Remote Control $71.13

Click here to search by yourself. Here are coupons that you can use.

Price history and price alert

It’s a new item in our database, so I can’t create price history chart. We have saved this price in database: $16.99.
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).

Leave a Reply

Your email address will not be published. Required fields are marked *