My Battery-Resistance-Voltmeter-Internal-Impedance-Meter-LCD-Rechargeable-SM8124A arrived today and, using it, I took measurements of the six LiitoKala Factory 30Q batteries (Table 1), and six 30Q batteries purchased from Orbtronics (Table 2). The tabulated data indicate two things: (1) The LiitoKala Factory batteries are not 30Qs, and (2) the SM8124A resistance meter (a) provides consistent internal resistance readings that are reasonable, and (b) is a valid tool for comparing batteries.

Table 1 - LiitoKala Factory Store 30Q

Internal Resistance Measurements (mΩ)

Cell Trial One Trial Two Trial Three

Trial Four

Avg

1 27.8 29.0 28.9 29.1 28.5
2 25.5 25.5 25.4 25.4 25.5
3 25.5 25.4 25.5 26.6 25.5
4 27.7 27.8 28.0

28.0

27.9
5 26.3 26.2 26.3 26.2 26.3
6 25.2 25.2 25.2 25.3 25.2

Table 2 - Orbtronics 30Q

Internal Resistance Measurements (mΩ)

Cell Trial One Trial Two Trial Three

Trial Four

Avg

1 11.4 11.4 11.4 11.3 11.4
2 11.4 11.5 11.3 11.4 11.4
3 11.4 11.5 11.4 11.3 11.4
4 11.4 11.4 11.4 11.4 11.4
5 11.7 11.7 11.7 11.9 11.8
6 11.5 11.4 11.4 11.3 11.4

A reading was taken for each battery sequentially in each trial. The SM8124A advertises an accuracy of 0.1 mΩ for this measurement range.