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If you are looking for a 12V 100Ah battery without a battery management system (BMS), it is important to note that it is often recommended that lithium-ion batteries be equipped with a BMS to ensure safe and efficient operation. A BMS helps protect the battery from overcharging, over-discharging, and other potential issues that can shorten its lifespan or pose a safety hazard.
However, if you still prefer a 12V 100Ah battery without a BMS, you may consider looking for a traditional lead-acid battery, which does not always require a BMS. Lead-acid batteries are commonly used in a variety of applications and are known for their reliability and lower cost compared to lithium-ion batteries.
When choosing a lead-acid battery, be sure to choose a reputable brand and check the specifications to ensure it meets your requirements for capacity, voltage, size, and other factors. In addition, consider proper charging and maintenance methods to ensure optimal performance and lifespan of the battery.