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LIR2450 VS CR2450: 3.7V CT-ENERGY LIR2450 rechargeable Li-ion button cell batteries, same size as disposable CR2450 batteries. No memory effect. The low self-discharge rate ≤3% per month. As a rechargeable design, it cannot work as long as the 3V CR2450 battery, but offers long-lasting performance. Please say goodbye to the constant battery changes and enjoy our rechargeable LIR2450. Safety protection: CTYOUNG rechargeable lithium 2450 batteries have protection against overcharging, over-voltage, overheating and short circuit. More safety for your everyday life. Multifunctional rechargeable button cells: rechargeable 2450 button cells are suitable for car keys, remote controls for clothes airers, monitoring units, computers, watches, Bluetooth speakers, toys, stopwatches, watches and more electronic devices. FAST CHARGING: It only takes about 3.5 hours to be fully charged with a CT ENERGY lithium button cell charger (sold separately). You can charge 4 packs of rechargeable 2450 batteries at the same time. Long service life: our LIR2450 battery is characterised by an impressive service life and can be charged more than 500 times on a single unit. This remarkable durability ensures extended usability and economy for all your devices and applications. Versatile rechargeable button cell batteries. The rechargeable 2450 button cell batteries are suitable for car keys, clothes horse remote controls, monitoring devices, computers, watches, Bluetooth speakers, toys, stopwatches, watches and other electronic devices