Again assuming 100% electrochemical conversion efficiency of 100%, thats 800mA/225mA = 3.5Hours charge time for a fully depleted battery in good condition. The actual SMPS Eff% could be 85% and the electrochemical conversion could be say 80%, giving a recharge time of just over 5 hours. E. The short answer is 8 V and above is a good battery. It’s not the entire answer, the battery typically really starts to spiral down at about 7.4 V that’s abo The range of current that can be delivered by a 9-V battery depends on its chemistry and quality of manufacturing (and design target). For example, a freshly made "Zeus 9V alkaline battery" can deliver 2.5 A of current (9.5V with 3.9 Ω load for 0.3s): With voltage drop of just 0.1 V, this make the battery ESR of 0.1/2.5 = 0.04 Ω. People also ask, Can I charge a 6 volt battery with a 9 volt charger? A 9V charger may be used to charge a 6V battery. The additional volts, on the other hand, will accomplish nothing except heat up the battery. As a result, charging a 6V battery using a 9V charger is not advised. Related Questions and Answers The nominal voltage of Li-ion batteries is 3.6V or 3.7V. NiMH and Lithium are the two most common types of rechargeable nine-volt batteries. Lithium batteries have double the capacity of NiMH batteries. The 9V NiMH battery lasts around four hours, whereas the rechargeable Lithium battery lasts 7 to 7.5 hours. . You do not need extra battery charger. The rechargeable battery has a long battery life due to its long-lasting durability, which can be recharged more than 1000 times. [LED Light Indicator] There is a built-in light indicator on the 9V rechargeable battery. When the battery is recharging, the Charging-Red light will be on. The following post explains a four simple yet a safe way of charging a Li-ion battery using ordinary ICs like LM317 and NE555 which can be easily constructed at home by any new hobbyist. Although Li-Ion batteries are vulnerable devices, these can be charged through simpler circuits if the charging rate does not cause significant warming of the Jun 28, 2011. #8. The phone needs 1500mAh. One 9V battery is only 200mAh. Then you need 7.5 9V batteries to fully charge a dead phone battery only one time. You also need a 5V regulator to reduce the 7.2V to 8.4V from the 9V batteries to 5.0V. You need a charger IC to charge 9V Ni-MH batteries. Hi there, As far as I know, batteries are not rechargeable at the moment. They still only serve the purpose of being discharged for radios or flashlights and night vision devices also Cars. The only battery that currently charges is that of vehicles when you drive them. However, you cannot remove or unload these to recharge other items. 9V battery Amp-Hours at 100 mA Discharge rate: 9V battery mAHs at 500 mA Discharge Rate: Amp-Hours at 1000 mA Discharge Rate: 9 Volt Alkaline: Duracell Coppertop: DC: 0.1 Volt: 310 mAH: 170 mAH: 90 mAH: 9 Volt Alkaline: Duracell Procell: DP: 0.1 Volt: 310 mAH: 170 mAH: 90 mAH: 9 Volt Alkaline: Energizer Industrial: EI: 0.1 Volt: 450 mAH: 330

how to charge 9v battery