Power Tests

Battery Test Report

1- Visual Inspection

2- Measurement of physical characteristics

3- Electrochemical characteristics

4- Battery Charge Capacity

5- Battery Open Circuit Voltage

6- Battery Closed Circuit Voltage

Battery Test Report

Start Date:

September 29th, 2025

End Date:

Part Name:

UMS-0038

Application:

Quantity:

1- Visual Inspection

Item

Test Item

Visual Inspection

Test Specification

Inspect the batteries for any deformation, bulges, dents, leaks, discoloration, and cracks on the batteries.

Remove the plastic covering of the cells to allow for clear view of the cells

Judge Criteria

There shall be no such defects or flaws stated in the test specifications in any of the received batteries. Report all findings.

Samples

Test Period:

Test Equipment:

Major Problem:

Warning:

Recommendation:

Verification Activities:

TBD

FM batteries

None

Use the ESD safe mat for all these inspections

None

Raw Data:

The batch number for all of these batteries are "BUR 030020586". The batteries were purchased from battery space in September 2024.

UMS-0036-01: no visible damage

UMS-0036-02: no visible damage

UMS-0036-03: small specs of rust near the positive terminal. no other visible damage

UMS-0036-04: no visible damage

UMS-0036-05: no visible damage

UMS-0036-06: small specs of rust near the positive terminal. small dent visible on the side

UMS-0036-07: small specs of rust near the positive terminal. no other visible damage

UMS-0036-08: no visible damage

UMS-0036-09: no visible damage

UMS-0036-10: no visible damage

UMS-0036-11: small specs of rust near the positive terminal. no other visible damage

UMS-0036-12: no visible damage.

2- Measurement of physical characteristics

Item

Test Item

Measurement of physical characteristics

Test Specification

A. The length, width, and height need to be measured and recorded. Length, width, and height are defined as the following:

Length: The horizontal length of the battery with the serial number upright.

Width: The vertical length of the battery with the serial number upright.

Height: The smallest dimension.

Measurements should be recorded with 0.1mm precision.

B. Record the mass of each cell/battery with 0.1g precision.

Judge Criteria

Length: 65 ± 0.6 mm

Width/ Diameter: 18 ± 0.6 mm

Height: N/A*

Mass: 40 ± 0.5 g

Samples

Test Period:

Test Equipment:

Major Problem:

Warning:

Recommendation:

Verification Activities:

October 11, 2024

EM batteries, voltmeter, scale, calipers

None

Use the ESD safe mat for all these inspections

None

3- Electrochemical characteristics

Item

Test Item

14-day Open circuit voltage test

Test Specification

Discharge each cell at constant voltage to the minimum allowable voltage specified by the manufacturer’s data sheet and terminate the discharge when current tapers below C/100. Record the OCV at discharge termination for each cell. Rest cells for 14 days while monitoring (checking) the OCV for each cell on days 1, 7 and 14.

Judge Criteria

Cells with declining voltages >2.0mV shall be rejected.

Samples

EM, FM

Test Period:

Test Equipment:

Major Problem:

Warning:

Recommendation:

Verification Activities:

October 14, 2025 -October 28, 2025

EM batteries, voltmeter

None

Use the ESD safe mat for all these inspections

None

• None of the cells had declining voltage of more than 2.0 mV (ΔOCV<-2.0 mV), therefore all the cells passed this test.

• Note that the largest delta happens between days 1 and 3. This could be due to the battery’s chemicals stabilizing after being fully discharged.

4- Battery Charge Capacity

Item

Test Item

Fully charge the batteries and measure the capacity

Test Specification

Fully charge the batteries at 1C rate (1500 mA charge current) and note the mAh charged for each cell. Use this value as a baseline for battery capacity.

Judge Criteria

Cells capacity shall fall within 1350-1650 mAh.

Samples

EM, FM

Test Period:

Test Equipment:

Major Problem:

Warning:

Recommendation:

Verification Activities:

October 13th, 2025

EM batteries, voltmeter, Battery charger (HiTEC X4 AC Pro)

None

Use the ESD safe mat for all these inspections

None

According to the test results below and the judge criteria for this test, all cells pass and show acceptable charge capacity.

5- Battery Open Circuit Voltage

Item

Test Item

Open Circuit voltage

Test Specification

Measure the Open Circuit Voltage (OCV) on the flight cells using a multi-meter and record the value for each of the cells. Measurements should be recorded with 0.1 V precision.

Judge Criteria

Open circuit voltage falls within range 3.2 to 3.4 V

Samples

EM, FM

Test Period:

Test Equipment:

Major Problem:

Warning:

Recommendation:

Verification Activities:

November 4, 2024

EM batteries, voltmeter

None

Use the ESD safe mat for all these inspections

None

According to the test results below and the judge criteria for this test, all cells pass and show acceptable OCV.

6- Battery Closed Circuit Voltage

Item

Test Item

Closed Circuit voltage

Test Specification

Ensure that the flight battery is at least charged to the manufacture’s recommended level before proceeding. After setting up the programmable load to a constant current of C/2, load the battery and wait for 60 seconds before recording the Closed-Circuit Voltage.

Judge Criteria

Closed circuit battery voltage falls within range 3.1 to 3.4 V

Samples

EM, FM

Test Period:

Test Equipment:

Major Problem:

Warning:

Recommendation:

Verification Activities:

November 4, 2024

EM batteries, voltmeter, Battery charger (HiTEC X4 AC Pro)

None

Use the ESD safe mat for all these inspections

None

The cells were loaded with a constant current of 0.7A and the CCV was recorded 60 seconds after applying the load. According to the test results below and the judge criteria for this test, all cells pass and show acceptable CCV.

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