WeVolt Battery Capacity Self-Test Contest
If your battery capacity doesn’t meet the rated spec, we refund you 100% or replace it with a brand-new one.
To strengthen customer trust and transparency, WeVolt offers a Capacity Self-Test Guarantee.
You can test your battery’s capacity (Ah) at home (or via a third-party). If the verified result, under the conditions below, is lower than the rated capacity for your model (as shown on the nameplate/spec sheet), WeVolt will provide a full refund.
How it works (3 steps)
Step 1
Perform a Capacity (Ah) Test
Recommended measurement (best accuracy):
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DC electronic load (constant current) or a DC load setup
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A meter that can count Ah (coulomb counter / shunt meter / test log)
Note: AC kWh only is usually not enough to confirm Ah. If you only have AC data, we may ask for DC-side Ah data or a retest.
Step 2
Submit Your Test Results
Send the required evidence so we can verify the test was done correctly.
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Required:
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Order number / proof of purchase (you may mask sensitive info)
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Battery model + clear photo of the serial number (SN)
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Screenshots/photos showing:
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Before test: SOC, voltage, temperature
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Fully charged: SOC, voltage, temperature
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End of discharge: total discharged Ah, voltage, temperature, SOC
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A short video (or continuous recording) showing:
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SN/label
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Discharge current setting
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End-of-discharge screen with total Ah
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Optional (helps faster verification):
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Electronic load logs / curves
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Coulomb counter data export
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Third-party test report
Step 3
Verification & Return
Once we receive complete materials, we verify and confirm the result.
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If verified capacity is below the rated capacity, return your device to our pointed facility and we will cover all logistics costs.
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If evidence or conditions are incomplete → we will request missing items or a retest
Step 4
Refund or Replacement
Let us know if you want a refund or replacement
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If you wish a refund, we will process it for you soon.
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If you wish a replacement, we will send you a new one and cover all related costs.
Requirements
Test Conditions
To ensure fairness and repeatability, your test must follow:
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Ambient temperature: 0–35°C (recommended 20–30°C)
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Discharge rate: 0.2C – 0.5C
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C-rate formula: Discharge current (A) = Rated Capacity (Ah) × C
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Rest time: After full charge, rest ≥ 2 hours before discharge
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Discharge end condition:
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Stop when the system reaches BMS low-voltage cutoff or the manual’s specified cutoff
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Do not stop early
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Ah measurement required: Must provide discharged Ah from a coulomb counter/shunt meter/load log
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Safety: High current is involved. Use correct cable size, tight terminals, protection (breaker/fuse), ventilation, and safe operation.
Pass/Fail rule
We compare your verified discharged capacity (Ah) to the rated capacity of your model (nameplate/spec sheet).
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Pass: Measured capacity ≥ rated capacity
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Fail: Measured capacity < rated capacity (under the required conditions) → full refund
If results are near the threshold or evidence is unclear, we may request one retest to eliminate measurement error.
Important terms
​Requirements
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One claim per battery serial number (SN)
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Not applicable if there is misuse, physical damage, water damage, unauthorized modification (BMS/wiring), or clear signs of improper operation
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Lithium battery return shipment must comply with dangerous goods regulations; packaging must meet safety requirements
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WeVolt reserves the right to request additional evidence to verify test conditions
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Submission template (copy/paste)
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Order number:
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Purchase channel/country:
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Battery model:
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Battery SN:
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Test date:
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Ambient temperature range:
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Discharge current (A) and C-rate:
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Rest time after full charge:
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Discharge end condition (BMS cutoff / manual cutoff):
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Total discharged capacity (Ah):
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Upload: screenshots + video + (optional) logs/report