Purchasing Tel 13897406993 Features maintenance without rehydration; small resistance, good high-current discharge performance; adapt to a wide temperature; low self-discharge; long life; charged the factory, easy to use; safety proof; unique formula, deep discharge recovery performance good; no free electrolyte, the side down a 90 degree field service applications can still use UPS uninterruptible power supply; Fire standby power; security alarm system; emergency lighting systems; post and telecommunications; power systems; electronic instrumentation; Road Traffic Tip: LED energy-saving lamps: electronic fishing; power tools; electric toys; portable electronic devices; photographic equipment; solar energy, wind power generation system.