Comparison · Batteries

Goonk 18650 2800 mAh or UltraFire TR17670 1800mAh 3.7V

Two models side by side: measurements taken by the author in their reviews, and their conclusions. The better value in each row is highlighted.

In brief: Based on review measurements: Capacity: Goonk 18650 2800 mAh (1383 mAh vs. 1320).

Model	Goonk 18650 2800 mAh2015Read review →	UltraFire TR17670 1800mAh 3.7V2014Read review →
Capacity, mAh	1383	1320
Weight, g	42	36
Review conclusion	Not recommended	Not recommended

Only in one review: Voltage 3.7 V (UltraFire TR17670 1800mAh 3.7V); Capacity at high current 1053 mAh (Goonk 18650 2800 mAh); Test current 1.8 A (UltraFire TR17670 1800mAh 3.7V); Price 9 $ (UltraFire TR17670 1800mAh 3.7V).

Goonk 18650 2800 mAh: Capacity varies widely; the author advises against using them in e-cigarettes and could not use them in his device.

UltraFire TR17670 1800mAh 3.7V: Capacity was below the rating and the promised protection circuit was absent; the author would not recommend buying them.

Figures were taken from the review text and checked against the quoted passages. Measurement conditions differ between reviews, so read the reviews yourself before buying. Prices at the time of review.