[chbot] LiPo 1200mAh 3.7V

[Henri Shustak]

Hello again,

Also, I crashed into a metal pole with a battery on board today. The balance port cable on the battery broke. This is an 1550mah 6S LIPO. Depending on the size it could work well. I am guessing you will solder the balance cables to a BMS board or if there is a connector you could solder the battery (or are you seeking the ability to easily replace the battery).

Any way as mentioned, just let me know how many cells in a battery you are after and also so if the 1550mah 6S (24V) Li-Po may be useful.

80mm x 50mm 35mm (approximate dimensions). This has an XT60 connector. Has had hardly any use. It is new from last month (probably less than 10 cycles). 

If this or some other ones would be of interest, then let me know.
H


> On 2/08/2020, at 9:43 PM, Stephen Irons <stephen at irons.nz> wrote:
> 
> Thank you. I did not even think of Trademe. 
> 
> I am following up a few leads from others on the group.
> 
> One thing that suddenly became clear is that the 6-digit number on these Lipos gives its dimensions, just like '18650' gives the dimension of that cylindrical cell. For rectangular cells, the format seems to be
> 'TTWWLL' where
> 	• TT is thickness in 0.1 mm units
> 	• WW is width in 1 mm units
> 	• LL is length in 1 mm units
> So my one is 603450 -> 50 x 34 x 6.0 mm.
> 
> That one on Trademe one is 903052 -> 52 x 30 x 9.0 mm.
> 
> We might have to redo our 3D printed mount to fit this size.
> 
> I can install JST terminals, and can probably change 2.54 mm to 2 mm spacing just by changing the housing, with redoing the crimping, so not too fussed about the connector.
> 
> Stephen Irons
> 
> 
> 
> On Fri, Jul 31, 2020 at 16:40, Mark Atherton <markaren1 at xtra.co.nz> wrote:
>> Trademe "1200maH" found this
>> 
>> 
>> https://www.trademe.co.nz/Browse/Listing.aspx?id=2721904869
>> 
>> 
>> as almost the first item. Not quite what you are looking for but maybe a way to find something locally ?
>> 
>> -mark
>> 
>> 
>> On 31/07/2020 3:51 PM, Stephen Irons 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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