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Battery replacement

A project log for Cheap RC Car : upgrade

Make it faster (no) and improve its range (yes) without breaking the bank

Christoph TackChristoph Tack 03/08/2021 at 20:030 Comments

The car is supposed to work with 6 AA-cells in series.  Only rechargeable cells are an option here.

NiMH

Li-ION

Setup 1

  1. Using a LiitoKala NCR18650B
  2. Charger : TP4056
  3. Protector : the single 8205A doesn't allow enough current.  So the over-current protection had to be bypassed.  This also disables under-voltage protection.  When someone forgets to turn off the car, the battery will be drained to death (as has happened already)
  4. Boost circuit to boot the Li-ION cell voltage to 9V using XT1208 (advertised differently).  This seems to work well.

Setup 2

Adding XT60 connectors so that Li-Ion battery doesn't need to be removed for charging.
Adding XT60 connectors so that Li-Ion battery doesn't need to be removed for charging.

The charger has an XT60 connector, so charging is easy.  There's no longer a risk of incorrectly plugging in the battery after charging.

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