[chbot] LiPo 1200mAh 3.7V

[Stephen Irons]

The thingy is built around the M5Stack which has a battery manager 
built-in, so charging is sorted.

The M5Stack is actually quite a nice little device. Based on ESP32, 
with a display and a few buttons in a nice housing that can stack 
together with various expansion modules with  a 2x15 pin expansion 
connector.

There are a number of mounting bases too: with magnets to stick to a 
fridge or whiteboard, keyholes to mount to screws, DIN rail (though it 
is not really industrial quality), etc.

I have 3D printed a base, and it fits very nicely. Made a custom PCB 
too.

It is more expensive than the TTGO, Heltek, whatever modules, until you 
factor in the cost of a housing and battery (included with M5Stack), 
and the heartache of destroying your loose PCB because something 
touched something it shouldn't have.

Stephen Irons


On Mon, Aug 24, 2020 at 19:44, Henri Shustak <henri.shustak at gmail.com> 
wrote:
> Hi glad you sorted it all out. I am guessing you have the BMS all 
> sorted. If not and you want me to charge one, then as long as it has 
> a nice connector I can help.
> 
> Henri
> 
>>  On 8/08/2020, at 8:30 AM, stephen at irons.nz 
>> <mailto:stephen at irons.nz> wrote:
>> 
>>  Thank you all for your help.
>> 
>>  It turns out that the Nicegear is really an Adafruit part, and they 
>> give the Adafruit part number on the Nicegear page.
>> 
>>  Adafruit will not ship Lipos only, but will send them using DHL at 
>> a sensible price of you put something else in the order. I guess 
>> this is the way phones are packed, with the battery separate.
>> 
>>  They should arrive next week.
>> 
>>  Stephen Irons
>> 
>> 
>> 
>> 
>>  On 31/07/2020 15:51, Stephen Irons <stephen at irons.nz 
>> <mailto:stephen at irons.nz>> wrote:
>>  I am looking for a few (2--5) LiPo batteries, around 1200 mAh 3.7 V 
>> with 2 mm JST connector, size about 50 x 35 x 7 mm.
>> 
>>  The BOM calls for 
>> <https://nicegear.nz/product/lithium-ion-polymer-battery-1200mah> 
>> but they are out of stock with no ETA -- they seem to be tricky to 
>> bring into the country at this time.
>> 
>>  Spare lithum cells seem tricky to buy from overseas. We buy AA 
>> Li-ion batteries in pairs inside cheap-as torches (and throw away 
>> the garbage housing) so they are shipped as consumer items, rather 
>> than spare batteries. But I have not found an off-shore source for 
>> these LiPos in a consumer device.
>> 
>>  I have looked at a few online hobby shops -- drones often use small 
>> lipos -- but have not had any success.
>> 
>>  Fairly urgent (10--14 days is when other offshore items are 
>> arriving), and I am happy to pay for DHL or similar shipping, but if 
>> they are really not available in NZ, we will have to think of an 
>> alternative.
>> 
>>  Does anyone have any suggestions?
>> 
>>  Stephen Irons
>> 
>> 
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