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Re: LattePanda Alpha 864 3D Model and Pinout

Posted: Fri Feb 08, 2019 8:43 pm
by ccs_hello
It's in the 0.3W to 0.5W range.

Search "Cube i7 battery" from Aliexpress.

Re: LattePanda Alpha 864 3D Model and Pinout

Posted: Sat Feb 09, 2019 2:49 am
by getzemani63
so I just need to buy this battery

https://es.aliexpress.com/item/7-4-V-ba ... 39.99734.0

do I need to connect it through the 10 pin battery port of the alpha? just like that?

Re: LattePanda Alpha 864 3D Model and Pinout

Posted: Sat Feb 09, 2019 5:35 am
by ccs_hello
It seems to be right.
When receive the battery pack, please check the pin out first before plugging it in.

Re: LattePanda Alpha 864 3D Model and Pinout

Posted: Sun Feb 10, 2019 10:54 am
by zzarr
Hello again!

Thanks for all the answers!

Is there a battery with 10-11 Ah capacity (7.4V) that fits?
(I have been searching for a battery but not found.)

Re: LattePanda Alpha 864 3D Model and Pinout

Posted: Sun Feb 10, 2019 8:54 pm
by ccs_hello
No. IMHO We are simply taking advantages of Alpha's cousins: small-screen ultra-compact Cube i7, i9, Mix, etc.
and their mass-production experiences (and spare parts.)

On the other hand, Cube laptop/tablet are designed for light weight and portability.
Larger battery pack will make Cube family unattractive.
70 - 90Wh battery packs are typically seen in large screen business laptops.

I.e., without sales in large quantity, there will be no commercial success.

Re: LattePanda Alpha 864 3D Model and Pinout

Posted: Mon Feb 11, 2019 7:43 am
by zzarr
Would it be possible to use 2 batteries?

(e.g. 2x5Ah, 7.4V)

Or is there a compatible charge/discharge/cutoff board that takes 2 3.7V cells?

Best Regards

Re: LattePanda Alpha 864 3D Model and Pinout

Posted: Mon Feb 11, 2019 2:09 pm
by ccs_hello
Just buy two pieces of 3.7V 4500mAh Li-Po batteries and parallel it to existing batteries.
I.e., turning the battery pack from 2S 1P into 2S 2P arrangement. (Charging time probably will be doubled and usable time will too.)

WARNING: you have to know underlying technologies and safe handling rules first! Lithium-Poly batteries are dangerous if not handled carefully!
For example, in the process of "paralleling" the batteries, you have to make sure the voltage level is about equal first or risking fire hazard!
All risks are on your own.

On the other hand, the fuel gauge IC BQ3060's internal settings will not be changed, so it will not know the battery capacity has increased.
<-- at this point no one reported the "BatteryInfoView" result of this "official" battery pack (i.e., whether or not the EC is reading BQ3060 thru I2C)

P.S. programming BQ3060 is rather involved (for factory engineers)

Re: LattePanda Alpha 864 3D Model and Pinout

Posted: Tue Feb 12, 2019 7:55 am
by zzarr
Can I charge lipo cells in parallel without any problem? (Don't I need a balanced charger?)

Is there a way to connect another BQ3060? (Through GPIO or any other way)

Best Regards

Re: LattePanda Alpha 864 3D Model and Pinout

Posted: Tue Feb 12, 2019 2:02 pm
by ccs_hello
re: Can I charge lipo cells in parallel without any problem? (Don't I need a balanced charger?)
Yes, the LP Alpha's charging circuit will still charge higher capacity pack. Just takes longer to get it fully charged.

The "factory" battery pack does not have battery balancer built-in. Many battery packs mfg do that because
(1) the batteries came out from the same batch thus they can stay "approximately balanced" for a long time and
(2) if losing balance, the consumers will buy another pack (nice! for them)

re: Is there a way to connect another BQ3060? (Through GPIO or any other way)
NO!
That's not how it works.
OS level power management -- > ACPI -- > EC -- > I2C -- > fuel gauge IC

Re: LattePanda Alpha 864 3D Model and Pinout

Posted: Wed Feb 13, 2019 7:39 am
by zzarr
Thanks for explaining that ccs_hello!

Can I build my own battery pack with desired cells? (What except for the cells would I need?)

Best Regards