Ok, so another question that seems simple, but Im confused. Building an Arduino project with a Rechargeable Battery. Ok, being a RC Guy, I understand batteries, and chargers, what I dont understand is how to charge a battery while connected to a circuit. If I use most batteries that I have, they are charged through a combination of the balance leads for each cell and the main power connector. Once the battery and circuit are encased in a box, this is no longer possible. Old fashioned NiCads are basically the same, charging through the power leads, still not possible to swap leads inside a case.
So how do I do this with a USB Connector that the charging and power supply are all taken care of with no lead swapping.
Thanks in advance

 

What is the battery chemistry?
How many cells are involved, presuming that they are connected in series?

 

The battery pack is removable in many applications.
Particularly for RC models, it is more convenient to carry around multiple fully charged battery packs than trying to recharge batteries in situ.

 

What is the battery chemistry?
How many cells are involved, presuming that they are connected in series?

to be honest, any inexpensive battery that will run an arduino, please see my own reply

 

You do remember that the Arduino has it's own voltage regulator? You can connect any rechargeable battery with less than 15VDC and the Arduino internally regulates it to 5VDC. As long as the "battery" remains above 5VDC the Arduino operates whether the battery is charging or not.

 

The battery pack is removable in many applications.
Particularly for RC models, it is more convenient to carry around multiple fully charged battery packs than trying to recharge batteries in situ.

In this case, my product that Im building will not allow easy battery egress, please see my own reply below

 

https://www.amazon.ca/MECCANIXITY-Lithium-Charging-Multi-Cell-Adjustable/dp/B0DYHDPMK5/ref=ci_mcx_mr_mp_m_d_sccl_3_12/145-4064817-1052366?pd_rd_w=p8rkA&content-id=amzn1.sym.3f0e3e21-f41b-47ae-9a2b-6ccda06d59fd:amzn1.symc.27c848cf-47ab-487b-bd07-91bc659e0119&pf_rd_p=3f0e3e21-f41b-47ae-9a2b-6ccda06d59fd&pf_rd_r=ZSEYSB0WFQM9336JFP0M&pd_rd_wg=EsS2e&pd_rd_r=aa8d1335-2590-4fe0-89c1-907a50d74383&pd_rd_i=B0DYHDPMK5&th=1

Ok, I came across this on amazon Canada. what voltage is optimum for Arduino??? is it 9v?? What batteries are expected to be charged using this board??
as well if I use a battery that already has a charging board, or a battery management board, or just simply want to access the wiring of each cell, do I remove that board in the battery

 

You do remember that the Arduino has it's own voltage regulator? You can connect any rechargeable battery with less than 15VDC and the Arduino internally regulates it to 5VDC. As long as the "battery" remains above 5VDC the Arduino operates whether the battery is charging or not.

Ok, I SHOULD have known that since the minimum voltage is listed at 7v, a perfect voltage for a 5v regulator...alas, my brain malfunctioned

 

Arduino uses linear regulator and depending on exact product used they may require up to 2.5V of overhead. but .... how much energy your device needs? why not use ingle Li-Ion cell and boost converter to go from 3.7 to 5V and forget about onboard regulator and Vin?

 

And if you want longer run times, use low power MCUs on low power boards.

 

hi Kim,
Look at this link, I use this type.
Also, you can just buy the battery holder and boost charger and use old laptop 18650 batteries.

E

https://www.amazon.co.uk/s?k=mobile+phone+battery+block&crid=3SOTLKDISKLAO&sprefix=mobile+phone+battery+block,aps,115&ref=nb_sb_noss

This is a home build pack, using an old case, housing 5 off old laptop 18650 batteries and a Booster module, gives approx 5Vout, 8AHr.