If there is no significant difference

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The batteries are ready to charge when both batteries are discharged to 0%. If one of the batteries is fully charged and the other is not, just wait until all batteries are fully charged. After a while, the customer can see that the difference between them gradually decreases.

If the purchase time and usage frequency of the two batteries are very different, we do not recommend using them in parallel.

Q: If this battery is the same size, can it be connected to other brands of batteries?
A: It is not feasible and there will be big risks. They look similar because they use a standard case, but their internal design can vary greatly, for example between batteries and between BMS.

Q: After using for a long time, I found that the SOC displayed on austria number data the battery LCD is not accurate. Does this mean the battery capacity will decrease?
A: After long-term frequent use of lithium iron phosphate batteries, it is normal for the capacity to decline. But in our experience, the SOC inaccuracy you describe is usually not due to capacity decline, but rather due to uncalibrated SOC. The SOC of our SLPO series lithium iron phosphate batteries needs to be calibrated using 100% depth of discharge. If the battery has not been fully charged and discharged for a long time, some deviation in SOC may occur. Therefore, we recommend that you fully charge and discharge the battery pack every few months (i.e., discharge 100% SOC to 0% SOC, and then fully charge the battery pack) so that the chip can record the actual maximum capacity of the battery pack, so that the battery pack can calculate the SOC for calibration.