4.93/5.0 star rating from 1,480+ verified Verified buyers. Compatible with AirTags, car key fobs, and smart home IoT sensors.
4.93 out of 5 stars based on 1480 Verified customer reviews.
Real-World Use Cases & User Highlights
Apple AirTag Charger: 35-min fast charge LIR2032 button batteries for luggage and key trackers.
Car Key Remote Batteries: Stop buying disposable CR2032/CR2025 fobs for BMW, Audi, Mercedes, Toyota.
Smart Home IoT Sensors: Power BLE temperature sensors, smart door locks, and glucometers.
4.2V MCU Protection: CE-battery, FCC, RoHS, UN38.3 certified overcharge and short circuit defense.
50 Authentic Verified Verified Customer Reviews
Essential charger for AirTags & car keys!Mark T. (US)
5 / 5 stars
Works amazingly well for my Apple AirTags and car key fobs! Charges LIR2032 in about 35 minutes. Clip design holds batteries firmly in place. LED turns from red to solid green when full.
Sehr gutes Knopfbatterie-Ladegerät!Hans Weber (DE)
5 / 5 stars
Absolut fantastisches Ladegerät für LIR2032 und LIR2450. Sehr schnelle Lieferung über den Shop, hochwertige Verarbeitung und der automatische Überladeschutz funktioniert perfekt.
In miniature electronic products and high-precision instruments, LIR1632 (16mm diameter, 3.2mm thickness) and LIR1220 (12mm diameter, 2.0mm thickness) serve as essential micro rechargeable power sources.
Because of their small physical footprint and typical capacity between 10mAh and 20mAh, these miniature button cells require extreme precision control from the charger dock.
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1. Specification Overview & Comparison
LIR1632: 3.7V / 20mAh capacity. Widely used in automotive key fobs, heart rate chest straps, and digital vernier calipers.
LIR1220: 3.7V / 12mAh capacity. Frequently deployed in RTC clock backup, micro laser pointers, and compact camera sub-boards.
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2. Micro-Current Safety Engineering
VSZAPOWER has developed a stepped trickle charging algorithm specifically tailored for LIR1632 / LIR1220 micro lithium button cells:
1. 10mA Initial Pre-Charge: Protects miniature battery chemistry from high current thermal shock.
2. Dual-Color Status LED Indicators: Red for charging, solid green for 100% full cut-off.
3. USB 5V Flexible Power: Operates seamlessly from laptop USB ports, power banks, or automotive 5V adapters.
