Friday, April 18, 2014

can i use a pocket bike battery to power a amp?




Efren


can i use a pocket bike battery to power a amp for a sound system
can i use a pocket bike battery to power a amp for a little sound system. nothing really big just like one small speaker big enough to fit on a bicycle



Answer
Those batteries don't have a lot of power to give. You can use it, sure, but it may only give you 100 watts of power for one hour, if it's a 10 amp battery. You might not even draw that much power, depending on how small an amp you have. A 5 watt amp might run for more than 10-15 hours, and then start sounding weak.Those batteries are kind of heavy and you might spend $30-$50 for one.

E-Bike battery questions?




Chris M


im currently looking to get a motor for my bike that's 500w, 650w or 1000w. The battery i have been told to get are far too expensive. they are 24V 10AH headway Lifepo4 battery's. but they are £250 quid i however found some batteries that where only £45 for 16 here are the specs 1.2v each , 10000mah each max discharge current 30 A max, they are NiMH rechargeable battery's, what i need to know is how long will these 16 batteries power either a 500w, 650w or 1000w motor if i connect them all up. im hoping to get around 5 hours or around 50 miles from them. all i know about the motors are the watts. it would be great if you could help me. thanks !


Answer
In physics, power (in watts) = amperage x voltage.

The 24-volt, 10-amp-hour battery gives you 240 watt-hours max.

The battery with 16 1.2-volt 10,000milliamp-hour cells gives you 16 x 1.2v x 10A-H = 192 watt-hours max.

You will NEVER get anywhere near 5 hours out of either battery running those motors at full power. Even the 24V/10A-H battery (capable of releasing just a maximum of 240 watts of power for one hour before it dies) will only give you less than 30 minutes of running on a motor putting out 500 watts of power.

Remember that electric-assisted bicycles (such as Trek's Ride+ e-bike) are not designed to run on just electric all the time. The electric motor and battery is only there to help you accelerate up to speed, then you must take over with good old fashioned pedal power.




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