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To calculate how long a 30Ah battery will last with an 850mA draw, you can use the formula: Battery life (hours) = Battery capacity (Ah) / Current draw (A). First, convert 850mA to Ah, which is 0.85Ah. Then, divide 30Ah by 0.85Ah, resulting in approximately 35.3 hours. Therefore, the battery will last around 35 hours under a continuous 850mA draw.
What else can I help you with?
How long will a battery with a 30 ampere hour rating supply a 240 Watt load?
The Ampere-Hour rating tells you how much energy can be extracted from a given battery. For our 30AH battery, you could draw 1A for 30 hours, 2A for 15 hours, 3A for 10 hours, 30A for 1 hour, or any combination where Amps X hours = 30, within reason. Are you talking about a battery supplying a load directly, like a 12V battery supplying a 240W, 12V heater? Or do you mean a battery running an inverter supplying a 120V, 240W load? For the direct load, first calculate Amps drawn by the load. Amps = Watts / Volts. Then divide the A/H rating of the battery by the load Amps. Example: * 240W, 12V heater * Amps = 240 / 12 = 20A * Time = 30AH / 20A = 1.5 hours (90 minutes) For a load run by invertor, you just divide the Watts needed by the efficiency of the invertor. The efficiency rating is almost always found on the nameplate or in the manual. Most modern invertors are in the range of 90% - 96%. Example: * Same as above, except load is 120V, 240W heater run through a 90% efficient invertor. * Watts drawn from battery = 240 / 0.9 = 267 W * Amps = 267 / 12 = 22.2A * Time = 30AH / 22.2A = 1.35 hours (81 minutes) One factor to consider: The Amp-Hour rating of a battery is only valid up to about 10% of capacity current draw. So, a 30AH battery is only 30AH for loads up to 3A. At very high loads, the available AH from a battery decreases. This derating varies with size and manufacturer, but don't count on getting every minute of operation from our example above, because our current draw is much higher than 3A. In this case we might only have 25AH or so to play with.
How many hours does a 280mAh battery?
If you draw 280mA continuously, the battery will last 1 hour. 140mA continuous use will last 2 hours and so on.
What does battery of 180 AMP HOUR mean to you?
it means battery can deliver 180 amperes per hour if driven at full load I.E, isa an application setup whican draw 180 amps is connected to a battery of 180 Ah it will delivery current till one hour . Chandra sekhar
If specification is 700mAH batteries can you use 850mAH batteries?
Sizing BatteriesIF there is room [physically] for an 850mAH battery to fit instead of a 700mAH battery, and it is the same type of battery [Lead-Acid, Ni-Cad, Gel Cell, etc.] then yes you can make the substitution. The 850mAH battery is just electrically slightly larger than the 700mAH battery. The numerical designations for the two battery examples you give in your question mean that the first battery will deliver 700 milliamps [700/1000th of an Amp] for a period of one hour. The same is true for the second battery except that it will delivery slightly more current[850mA] for one hour, or the same 700mAH rate for a slightly longer time.
If a 12 volt 18 amp hour battery is installed in a circuit with a continuous 1 amp current draw on the battery what would happen?
would discharge in 18 hours
On a 98 sts cad you changed the battery and drove it for an hour parked Returned the next morning car is dead no clicking whatsoeverWhat could it be?
check battery cables, if ok, there may be a parasitic draw on the battery, take it to a professional
How long do amp hours last?
If you draw one amp of power for 1 hour that is an amp hour . If you have a different load eg a heater drawing 3 amp , it would be 20 minutes . Divide the hour ( 60 mintues ) by the amps you draw .
How long will a 10 watt pump run a 12v 70 amp battery?
To answer this question the amperage draw of the motor must be given. This amperage is then divided into the amp hour capacity of the battery to find the endurance time of the motor.
What does 8Ahmean on a 12 volt battery?
Amp hours is a battery rating. It means that this battery can sustain 1 amp for 8 hours up to 8 amps for 1 hour. Depending on what the current draw is on the load will determine the length of time the battery will last.
What causes a vehicle to use current after sitting for 1 hour?
Usually the Anti-Theft/Security features will draw the most power. You can measure the current draw from the battery (with the engine off) if you have access to a multimeter. It should be in the mA range.
How do you calculate 24 volt battery life with a continuous 1500 watt draw?
You'll need to know the capacity of the battery. Current requirement for 1500 watt at 24 V is: 1500/24= 62.5 amps. If the battery has 62.5 amp hours it would in theory last one hour. if the battery had something like 80 amp hours, it'd last for about one hour 20 minutes.
How long does a 12v 7ah 20hr battery last?
Depends on the current draw of what you hook it up to. At a draw of 7 amps (80 watts) it'll last for one hour. At a draw of 1 amp(12 watts) it'll last for 7 hours, ASO.
