Yuasa Battery 12V200AH Beijing distributor What is self-excited switching power supply self-excited switching power supply is a use of intermittent oscillation circuit switching power supply, one of the basic power supply is now widely used. When the access to power in R1 to switch VT1 start current, so VT1 starts conducting its collector current Ic linear growth in L1, L2 induced ambassador in VT1 base is extremely positive and extremely negative emission positive feedback voltage so VT1 quickly saturated. At the same time, the induced voltage to charge C1 C1 with higher charging voltage, VT1 base potential gradually decreases, resulting in saturation region VT1 quit, Ic begins to decrease in the induced L2 mission VT1 base is extremely negative, emit extremely a positive voltage, so that VT1 rapidly closing, then the diode VD1 is turned on, high-frequency transformer T primary winding of the energy storage to the load is released. When VT1 end, L2 no induced voltage DC power supply input voltage but also by R1 to C1 reverse charge, a gradual increase in VT1 base potential to re-turned, flipped again reached saturation, so repeated oscillation circuit continues . It's like a single-ended flyback switching power supply as the voltage from the secondary winding of the transformer T to load output needs. Self-excited switching power supply in the switch and the switch plays the dual role of the oscillation, but also eliminates the need for a control circuit. Because of the load circuit is located in the transformer secondary and flyback state, has the advantage of isolated input and output. This applies not only to the power supply circuit, also apply to small power supply. To prevent exposure to the sun in the sun exposure will increase the battery temperature, battery increases the activity of each active substance, affecting battery life. UPS battery - UPS battery discharge when the battery discharge temperature control at -15 ℃ - + 50 ℃ in the range of. Please continuous discharge current control in 3CA following (H control 6CA below). Discharge voltage varies according to the size of the current, generally as described below. Note that when you put a voltage not less than the following voltage. Please charge quickly after discharge. Please also do not care if the charge immediately after over-discharge. Safety Precautions 1. Battery + - terminals can not short circuit. (Inter-terminal short-circuit may cause burns, smoke, fire hazard.) 2, can not be charged in a sealed container. (Charged in a sealed container, the container may rupture and cause personal injury.) 3, the battery can not be placed in confined spaces or near ignition sources. (Such as placing in these places, it may cause an explosion, fire danger.) 4, a torque wrench, wrench and other metal tools, plastic insulation tape and other post processing uses. (If not insulated, after a short circuit can cause burns, damage batteries, explosion.) 5, this battery can not be decomposed, transformation. (Internal batteries contain sulfuric acid, if contact with eyes, skin and clothing may cause blindness or burns.) 6, if found electric tank, cover, etc. There are cracks, deformation and other damage and overnight phenomenon, replace the batteries. 7. Do not use the letter that water, gasoline, kerosene, oil, organic solvents and volatile liquid detergent to clean the battery. If you use these substances may cause electric tank or SC (ABS resin) cracks, leakage. 8, regularly replace the battery, do not extended use. Our network traffic jam never forge ahead in unity, innovation, hard work and progressive reputation-based service is the root, supports and encourages young talent, dedication wing group love party patriotic, law-abiding, pragmatic and pioneering spirit of honesty and trustworthiness, flexibility, perseverance, courage innovation and enthusiasm, changing concepts, enhance knowledge, to meet the challenges of our management philosophy: humane, systematic, scientific, international and our business philosophy: to advanced technology and services to customers - creating value, creating a win-win our service concept : to all of our customers to grow as a fundamental style: passion, unity, integrity, win-win, dedication, responsibility to our market outlook: the customer's suggestions and comments as a learning and research. Hercules battery sales URL: www.dlsxdcdl.com champion Battery Battery Sales Website: www.guanjunxdcdl.com Panasonic battery sales URL: www.songxiadcdl.com www.upsxdcdl.com