<p><strong><span style="font-size:20px">Features:</span></strong></p><p>1. Input voltage = equipment operating voltage = battery charging voltage = battery full voltage</p><p>2.Utilizing the working voltage on the lithium battery 0 differential pressure complete full, very suitable for electronic professionals</p><p>3. Ordinary switching power supply can be charged, comes with a constant current circuit, does not require a special charger for lithium batteries</p><p>4.0 switching time, seamless switching, this product is the true meaning of the uninterruptible UPS</p><p>5. Comes with charging status display, simple and intuitive, very suitable for product matching</p><p>6. High efficiency = (11.1V-0.3V)/11.1V*100%=97.3%; the higher the voltage of the battery series discharge efficiency will be infinitely close to 100%!</p><br/><p><strong><span style="font-size:20px">Parameter:</span></strong></p><p>Charging red light, full off</p><p>Capacity: Battery capacity: 3*3.7V*3400mah=37 watt-hours (batteries user-provided)</p><p>Rated output power: 12V2A=24W</p><p>Whether voltage stabilization: not voltage stabilization, 3 batteries in series direct output, full 12.6V, low voltage protection 8V, voltage increases or decreases with the amount of electricity Application type: for unattended, need to automatically charge and discharge management scenarios, fiber optic cats, routers, monitoring, fish tank pumps, etc.</p><p>Battery type: 3.7V flat 18650 battery</p><p>Charger type: built-in 0.4A current limiting module, can use 12-13V power supply charging, 12.7V is recommended.</p><p>Charging power: 12V0.4A=4.8W; input power&gt;=(load power+5W)</p><p>Protection circuit parameters: overcharge protection 4.25V * 3; low voltage protection 2.75V * 3; overcurrent detection voltage 0.1V +-0.025V</p><p>Using temperature range: -20~60℃</p><p>DC interface standard: DC5.5*2.1mm (inside positive and outside negative)</p><p>Warm tips: UPS function protection board do not do short-circuit protection test, may break through the diode. When the diode is broken down only after the short-circuit protection will be generated</p><br/><p><strong><span style="font-size:20px">Package include:</span></strong></p><p>UPS battery box * 1</p><p>Wire *1</p><p></p>