USB powered LR2032 LiR2032 rechargeable Lithium coin cell charger
Designed by Lune Wolf Engineering in United States of America
This product is no longer available for sale.
The seller may be offering an improved version or it may be hanging out on the beach, enjoying the retired life.
What is it? This device, created by Lune Wolf Engineering, is designed specifically for recharging rechargeable 20mm Lithium ion coin cell types LR / LiR- 2016, 2025, 2032, frequently used in clocks,…
Read More…This device, created by Lune Wolf Engineering, is designed specifically for recharging rechargeable 20mm Lithium ion coin cell types LR / LiR- 2016, 2025, 2032, frequently used in clocks, computers, wristwatches and other devices requiring a low-voltage, low-current power source.
This is a compact, inexpensive and very portable device designed with cost and ease of use in mind. Gold plated contacts resist corrosion and assure perfect connection with USB jack. Hand-assembled at LWE's shop in Pennsylvania USA, each unit is tested before packaging.
Do not use this device to recharge Maxell / Renata / FDK et'c ML2032 / ML2016 rechargeable Lithium cells, or similar cells with a nominal output voltage lower than 3.6 Volts. Those cells are designed for a voltage much lower than the recharge voltage of this device. Using this device to recharge ML20nn cells may result in battery explosion and / or damage to the device.
Do not use this device to attempt to recharge CR2016 / CR2025 / CR2032 cells or any other disposable cells. Those cells are not designed to be recharged. Using this device with CR20nn cells may result in battery explosion and / or damage to the device.
Do not plug this device into a USB jack without first inserting a battery. Operating this device without an appropriate battery in the battery holder may damage the device.
Do not insert the battery 'upside down' with the negative contact facing out. The battery will not charge. Doing so may damage the device.
Do not stack two 16mm cells in the battery holder. The batteries will not charge, as their combined series voltage is greated than the device's charging voltage. Doing so may also damage the device.
white 'power on' light does not come on:
‣ Check that the USB jack is powered at 5 Volts.
‣ The device may be inserted upside-down. Try turning it over.
all three lights come on:
Unplug the device from the USB jack at once.
‣ Check that the battery is properly inserted.
‣ The battery may be exhausted and incapable of being recharged. Check with a VOM to see if the cell's resistance is less than 75 MΩ.
battery is not recharged after more than 2 hours:
Unplug the device from the USB jack.
‣ The battery may be exhausted and incapable of being recharged. Check with a VOM to see if the cell's resistance is less than 75 MΩ.
supply voltage: 5 Volts USB type A jack
regulator IC: Microchip Tech MCP73831
battery charge current: 37 mA
battery charge time: 60 - 90 minutes typical
These device have been assembled by hand. Small cosmetic imperfections may be evident. These do not affect the device's operation.
These devices are assembled with silver-tin solder and composed of RoHS-compliant components, and are acceptable for export to the EU.
There are many USB-powered LR20nn chargers on the market, but many of them are expensive and bulky. This device fills the market niche at reduced cost and size.
Mostly, its cost. And its size and portability.
I will ship to all addresses in the United States and territories, and countries in Europe and Asia. Buyers outside of the United States should submit a pricing request.
Documentation link to Hackaday is below. Buyer should read the documentation. Feel free to ask the seller if there are any further questions.
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