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how would i know if my battery's are bad


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i have 2 batcap 3000 and 1 2000 and i charged these battery's 1 month ago and the only amp i have hooked is a 650 watt amp that's not being used but still being powered up i went to check the voltage they where 12.4 volts so is it normal that there that low or do i have bad battery's

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subs amp incriminator audio 20.1
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mids/highs amp incriminator audio 6.4
equalizer clarion
crossover interfire
alternator 1 mechman 240amp
battery's xs power 1 d2100 2 d3100
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memphis car audio 1/0 ofc
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sky high car audio 8 gauge ofc

sky high car audio 12 gauge ofc

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Do a battery load test. At autozone, pepboys, or national auto. Whatever is close to you, as far as i know its free.

And its batteries. =P

x2

he wouldnt be the first to say they did a 167 with a system like that (one that clearly DOESNT), but i have to say, he didnt beat me anywhere, ive never competed against the guy. If he thinks his does a 167, mine would probably put him in a coma. :hairtrick:

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just charge them over night aand u will be fine and dead is usealy around 10

Not exactly true. If a battery rests at 12.3 or lower you should replace it. Because it is on its last days, and takes more from the alternator to keep charged. If the alternator is working extra hard then your battery and alternator are straining and shortening their own lives.

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but also i have a stinger voltage meter. it's reading 13.3 volts

people who have bought from me Team Bassick (ALPINE) Purplehaze nidus

head unit sony dsx-s310btx
subs 2 12 incriminator audio king of bass
subs amp incriminator audio 20.1
mids/highs
mids/highs amp incriminator audio 6.4
equalizer clarion
crossover interfire
alternator 1 mechman 240amp
battery's xs power 1 d2100 2 d3100
sky high car audio 1/0 awg ofc wires

memphis car audio 1/0 ofc
xs power xs flex 4 awg

sky high car audio 8 gauge ofc

sky high car audio 12 gauge ofc

t spec rca


check out my building log http://www.stevemead...frey-build-log/

http://www.stevemead...d-other-things/

check out audio gear i have for sale
http://www.stevemead...51#entry1595151

Mechman_300x100px-2.jpg

3d7304fe.jpg

header3-1.gif

SkyHighCarAudio_zps27302c94.png

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well this voltage has no settings and there 3 wires for it red blue and something selse

people who have bought from me Team Bassick (ALPINE) Purplehaze nidus

head unit sony dsx-s310btx
subs 2 12 incriminator audio king of bass
subs amp incriminator audio 20.1
mids/highs
mids/highs amp incriminator audio 6.4
equalizer clarion
crossover interfire
alternator 1 mechman 240amp
battery's xs power 1 d2100 2 d3100
sky high car audio 1/0 awg ofc wires

memphis car audio 1/0 ofc
xs power xs flex 4 awg

sky high car audio 8 gauge ofc

sky high car audio 12 gauge ofc

t spec rca


check out my building log http://www.stevemead...frey-build-log/

http://www.stevemead...d-other-things/

check out audio gear i have for sale
http://www.stevemead...51#entry1595151

Mechman_300x100px-2.jpg

3d7304fe.jpg

header3-1.gif

SkyHighCarAudio_zps27302c94.png

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