1. Inspection of appearance: Check if the battery casing is protruding, leaking, disconnected, or if the battery terminals are corroded. If this phenomenon occurs, it indicates that the battery has already died; 2. Test voltage: After charging for two hours, the voltage of the individual battery is tested every 20 minutes. If it is less than 13V, it indicates a problem. During discharge, it is tested three times every 10 minutes. If the discharge time is faster than other batteries and less than 10V, it indicates a problem with the battery; 3. Check for water loss and blackening: After charging the battery for 36 hours, the charger kept a red light on during charging, indicating severe water loss of the battery. Opening the cover above the battery reveals six circular holes. Check the color of the electrolyte in each hole, and if it is black, it indicates that the lead powder on the electrode plate has fallen off and this battery is necrotic
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China