12V 9Ah battery is a rechargeable Sealed Lead Acid (SLA/AGM) unit, commonly used for UPS systems, security alarms, and toys. It delivers 12 volts with a 9 amp-hour capacity (e.g., 9 amps for 1 hour or 1 amp for 9 hours). These maintenance-free, spill-proof batteries usually weigh around 2.4-2.7 kg