Test/review of Shockli 4x18650 7.4V 4400mAh

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HKJ
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Test/review of Shockli 4x18650 7.4V 4400mAh

Shockli 4×18650 7.4V 4400mAh

DSC_6457
Official specifications:


  • Rated capacity: 4400mAh
  • Rated voltage: 7.4V
  • Weight: 250g
  • Cable length: 55cm

Shockli%204x18650%207.4V%204400mAh-info

This is a four cell bicycle battery pack.

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The cells is packed in rubber and includes a pouch for mounting the pack on the bike.

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Inside the rubber the batteries are packed in two layers of shrink wrap.
The cable do not have a real strain relief, but the shrink wrap helps keeping it in.

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The pack uses Chinese batteries, not really a surprise with a 4400mAh pack rating.

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The protection circuit looks like it is checking both cell pairs, but without balancing.

Shockli%204x18650%207.4V%204400mAh-Capacity

Capacity is considerable better than rated. The over current protection can trip at 5A load (This is temperature depend).
The pack was up to about 53° during my test (Measured in the pouch).

Shockli%204x18650%207.4V%204400mAh-CapacityTimeHours

Shockli%204x18650%207.4V%204400mAh-CapacityTime

Shockli%204x18650%207.4V%204400mAh-Energy

Shockli%204x18650%207.4V%204400mAh-PowerLoadTime

The pack can easily drive a 10W load, but 30W is a bit much (25W would probably be fine).

Shockli%204x18650%207.4V%204400mAh-TripCurrent

Shockli%204x18650%207.4V%204400mAh-Charge



Conclusion

The pack works fine, but has a fairly low capacity.



Notes and links

The battery was supplied by Shockli for review.

How is the test done and how to read the charts
How is a protected LiIon battery constructed
More about button top and flat top batteries

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

Rusty Joe
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Thanks.

Eat Once a Day - Lose Weight - Feel Great!

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Shadowww
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Those crappy packs make me never regret spending some time to assemble a 6x NCR18650B pack myself. At 10200 mAh / 7.4V, my 2x XM-L2 bike lights (one throw, one flood) run for 3+ hours on max brightness Silly