Nitecore NL1835R (3500mAh) 18650 The Nitecore NL1835 is high capacity 3500mAh rechargeable battery from Nitecore. This battery has advanced safety features like a microporous barrier protecting internal components and nickel plated stainless steel protectors offering external protection. High performance internal circuitry prevent overcharge, over-discharge and short-circuiting, making this a great battery for high drain devices like Nitecore TM series and other high power LED search lights and tactical flashlights.