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WeMos D1 Mini Lithium Battery Shield (HCWEMO0009) 
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Joined: Sun Aug 05, 2012 4:02 pm
Posts: 667
Post WeMos D1 Mini Lithium Battery Shield (HCWEMO0009)
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The WeMos lithium battery shield provides a means of powering your WeMos mini, or WeMos mini Pro (see item HCWEMO0002) from a single cell (3.7V) lithium battery. The shield contains a DC-DC converter to step-up the batteries 3.7V to 5V supplying your WeMos mini and shields with up to 1A of power. When the battery is depleted simply plug the shield into a USB power source using a mini USB cable and it will automatically recharge the battery. Two LEDs on the shield indicate when the battery is charging and when charging has completed.



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Specification

Charging Voltage: 10V MAX 5V Recommended
Charging Current: 1A
Lithium Battery Voltage: 3.3-4.2V
Boost Power Supply: 5V (Max 1A)



Ports:

XH2-2.54mm (Port 1): Connect to lithium battery (3.3-4.2V)
Micro USB: Charging Port (5V)
Green LED: Illuminates when charging is complete
Red LED: Illuminates when charging is in progress
J1: Sets the maximum charging current: 0.5A or 1A




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Schematic:
Attachment:
HCWEMO0009_Schematic.pdf




Libraries, example code, and diagrams are provided as an additional free service by Hobby Components and are not sold as part of this product. We do no provide any guarantees or warranties as to their accuracy or fitness for purpose.

Descriptions and diagrams on this page are copyright Hobby Components Ltd and may not be reproduced without permission.


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Tue Nov 29, 2016 11:54 am
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Joined: Thu Mar 13, 2014 12:46 pm
Posts: 25
Post Re: WeMos D1 Mini Lithium Battery Shield (HCWEMO0009)
Hi,
Do you know if this acts like a backup battery so if I power the D1 from the USB connector it provides 5 V to the D1 and charges the connected battery at the same time and if I remove the USB power it still provides 5V to the D1 from the connected Battery?


Sat Apr 29, 2017 9:54 pm
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Site Admin

Joined: Sun Aug 05, 2012 4:15 pm
Posts: 675
Post Re: WeMos D1 Mini Lithium Battery Shield (HCWEMO0009)
Yes that is correct. Whilst the USB cable is connected both the battery will be charged, and 5V will be supplied to the 5V pin (~4.5V). If the USB cable is disconnected 5V will continue to be applied to the 5V pin (~5V) whilst the connected battery holds a charge.

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Tue May 02, 2017 10:03 am
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Joined: Thu Mar 13, 2014 12:46 pm
Posts: 25
Post Re: WeMos D1 Mini Lithium Battery Shield (HCWEMO0009)
Thanks, just what I thought.


Tue May 02, 2017 11:31 am
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