![]() They are really only exposed to 1.6 watts. This gave me about 3.0Watts of power dissipation using 0.5W resistors-Because I used an AC charger, the 3.0W capacity is more than enough, because the resistors get to rest during the negative AC half cycle. I used a set of 6 resistors to get near my 60 ohms. 2.4Watts / 2 (because of AC tranformer ) = 1.6Watts. 12V * 0.2A = 2.4Watt of heat that will be generated. ![]() 20V charger - 8V battery = 12V difference. The fully discharged voltage of a NiCd cell is 0.8V. The nominal voltage of a fully charged NiCd cell is 1.2V. 1.6Amp hour capacity / 8 = 0.2A charge rate. Use 1/16 in the math for DC chargers, or it will kill your packs or maybe start your house on fire. Because mine is an AC output transformer, I had to double that to 1/8th. I aimed for a nice, slow 1/16th C charge rate (capacity divided by 16). I used an AC output pack, so the charger outputs effectively half that of a DC wall transformer. BATTERY PACKS WILL ACCEPT EXCESS CHARGE CURRENTS WHILE REMAINING COOL UNTIL THEY ARE FULL-AT THAT POINT THEY WILL START TO OVERHEAT AND MAY CATCH FIRE OR EXPLODE. THIS COULD BURN DOWN YOUR HOUSE, PERHAPS SETTING OFF A CHAIN REACTION OF FIRES THAT BURNS DOWN YOUR WHOLE TOWN. MISTAKES IN SELECTING COMPONENTS CAN START A FIRE. If you have any doubts on how to do this, consult an expert on the topic or quit. The reason chargers will not recharge bad battery packs is because charging them could cause them to overheat, swell, and possibly leak which could cause damage to the scooter or its surroundings.A diode, an LED, and a few resistors are required to make sure the battery pack is charged at a safe rate. Battery packs that do not bounce back to their normal Voltage range after being used are defective and most battery chargers will not charge them if they detect this. Good battery packs will always bounce back to their normal Voltage range within a few minutes after being used. If the battery packs Voltage is lower than the Voltage of the vehicle then that could cause the battery charger to not charge the batteries and the red light to not turn on. Pack's Voltage could be tested at the charger port with the vehicle onĪnd throttle engaged to see if it drops Voltage under load. When the vehicle is on causing the vehicle to not operate. However just because the battery pack has the right Voltage at the charger port thatĭoes not mean that it is good because its Voltage may drop under load Respect to the battery charger operating properly. Port, and wiring between the battery pack and charger port are good in If the battery pack Voltage is correct then the battery pack, charger The battery pack Voltage should be a little above the Voltage of the vehicle (a 24 Volt vehicles battery pack should output around 27 Volts, etc.). Next test the Voltage of the battery pack at the charger port. If the charger does not have a fuse then it may need ![]() If the charger has no output Voltage thenĬheck to see if it has a fuse and replace the fuse if necessary, then If theĬharger output Voltage is correct then the charger and charger plug are TheĬhargers Voltage should be a little above the Voltage of the vehicle (aĢ4 Volt vehicles charger should output around 29 Volts, etc.). Wire or defective connector between the battery pack and charger port, a defective charger port or battery charger plug, aīurned out fuse in the charger, or a defective battery charger.įigure out the problem first test the Voltage output of the charger. Have a full charge, worn out batteries with low Voltage that need to be replaced, a loose It could be from new batteries that have never been used and ![]() If the charger light stays green and there is no red light when the charger is plugged into the vehicle and into the wall this could be caused by many When the red light turns off and only the green light is on that indicates that the battery pack is charged and the vehicle is ready to use. When the charger is plugged into the vehicle and into the wall the red light indicates that the battery pack is charging, and the green light indicates that the charger is plugged into the wall. Most electric scooter and bike battery chargers have a green light and a red light. Solution home Solutions Tech Support Charger Light Stays Green When Charging ![]()
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