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FishFinders and battery useage (any electrians here?)
2 different systems(on my kayak) and 2 radically different battery
lifespans. -------------------------------------------------------------------- My old set-up: Battery....Cabela's....12vdc..7.0Ah Eagle FishEasy 2 Current Drain...................300 ma (lights off) Output Power...................1500 watts (peak to peak) 187.5 watts (RMS) -------------------------------------------------------------------------- New system: Battery........."Power Source" .....12VDC......7.5Ah Garmin 160 Power Usage.........10 watts max Nominal.....12VDC @ 0.8 Amps Performance Sonar Power Output...........400 watts RMS 3200 watts peak to peak ---------------------------------------------------------------------------- -- Now here is the symptoms. With my old setup the battery would last a long while. I would guess 40 hours. In my new setup, the battery lasts about 6 hours. Above are all the specs I could find. Are there any electrically minded folks here that could explain the difference? Is my new battery defective? Thanks |
FishFinders and battery useage (any electrians here?)
Hey Shredİ
You are mostly concerned with amps -- the amount of electricity used. your old set up your fish finder used 300 milliamps (or .3 amps) your battery has 7 amp hours , which means, it will put out 1 amp for 7 hours or 7 amps for one hour. 7 amp hours divided .3 amps = about 23 hours of use your new system has 7.5 amp hours (more power) but the Garmin uses .8 amps. 75 divided .8 = 9 hours of use. Temperature, resistance and other factors enter in here. I dont know where in the county you are but if the temps are cooler than with your old system, you might see a drop in battery life. SHREDİ wrote: 2 different systems(on my kayak) and 2 radically different battery lifespans. -------------------------------------------------------------------- My old set-up: Battery....Cabela's....12vdc..7.0Ah Eagle FishEasy 2 Current Drain...................300 ma (lights off) Output Power...................1500 watts (peak to peak) 187.5 watts (RMS) -------------------------------------------------------------------------- New system: Battery........."Power Source" .....12VDC......7.5Ah Garmin 160 Power Usage.........10 watts max Nominal.....12VDC @ 0.8 Amps Performance Sonar Power Output...........400 watts RMS 3200 watts peak to peak ---------------------------------------------------------------------------- -- Now here is the symptoms. With my old setup the battery would last a long while. I would guess 40 hours. In my new setup, the battery lasts about 6 hours. Above are all the specs I could find. Are there any electrically minded folks here that could explain the difference? Is my new battery defective? Thanks |
FishFinders and battery useage (any electrians here?)
Thank you for the explanation!
"Fritz Nordengren" wrote in message news:_AWqb.140754$Tr4.363844@attbi_s03... Hey Shredİ You are mostly concerned with amps -- the amount of electricity used. your old set up your fish finder used 300 milliamps (or .3 amps) your battery has 7 amp hours , which means, it will put out 1 amp for 7 hours or 7 amps for one hour. 7 amp hours divided .3 amps = about 23 hours of use your new system has 7.5 amp hours (more power) but the Garmin uses .8 amps. 75 divided .8 = 9 hours of use. Temperature, resistance and other factors enter in here. I dont know where in the county you are but if the temps are cooler than with your old system, you might see a drop in battery life. SHREDİ wrote: 2 different systems(on my kayak) and 2 radically different battery lifespans. -------------------------------------------------------------------- My old set-up: Battery....Cabela's....12vdc..7.0Ah Eagle FishEasy 2 Current Drain...................300 ma (lights off) Output Power...................1500 watts (peak to peak) 187.5 watts (RMS) -------------------------------------------------------------------------- New system: Battery........."Power Source" .....12VDC......7.5Ah Garmin 160 Power Usage.........10 watts max Nominal.....12VDC @ 0.8 Amps Performance Sonar Power Output...........400 watts RMS 3200 watts peak to peak -------------------------------------------------------------------------- -- -- Now here is the symptoms. With my old setup the battery would last a long while. I would guess 40 hours. In my new setup, the battery lasts about 6 hours. Above are all the specs I could find. Are there any electrically minded folks here that could explain the difference? Is my new battery defective? Thanks |
FishFinders and battery useage (any electrians here?)
"Fritz Nordengren" wrote in message
news:_AWqb.140754$Tr4.363844@attbi_s03... Hey Shredİ You are mostly concerned with amps -- the amount of electricity used. your old set up your fish finder used 300 milliamps (or .3 amps) your battery has 7 amp hours , which means, it will put out 1 amp for 7 hours or 7 amps for one hour. 7 amp hours divided .3 amps = about 23 hours of use your new system has 7.5 amp hours (more power) but the Garmin uses .8 amps. 75 divided .8 = 9 hours of use. Temperature, resistance and other factors enter in here. I dont know where in the county you are but if the temps are cooler than with your old system, you might see a drop in battery life. Fritz, I didn't check the numbers, but your explanation is dead on. Bob SHREDİ wrote: 2 different systems(on my kayak) and 2 radically different battery lifespans. -------------------------------------------------------------------- My old set-up: Battery....Cabela's....12vdc..7.0Ah Eagle FishEasy 2 Current Drain...................300 ma (lights off) Output Power...................1500 watts (peak to peak) 187.5 watts (RMS) -------------------------------------------------------------------------- New system: Battery........."Power Source" .....12VDC......7.5Ah Garmin 160 Power Usage.........10 watts max Nominal.....12VDC @ 0.8 Amps Performance Sonar Power Output...........400 watts RMS 3200 watts peak to peak -------------------------------------------------------------------------- -- -- Now here is the symptoms. With my old setup the battery would last a long while. I would guess 40 hours. In my new setup, the battery lasts about 6 hours. Above are all the specs I could find. Are there any electrically minded folks here that could explain the difference? Is my new battery defective? Thanks |
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