Author Topic: Battery volt meter  (Read 309 times)

Offline Garyandjoanlee

  • Foredeck Crew
  • *****
  • Posts: 58
  • Karma: 4
  • Bad spellers of the world, UNTIE!
Battery volt meter
« on: July 10, 2017, 03:48:54 PM »
Quick tip that I am enjoying!  These simple and inexpensive volt / amp meters plug in to your cigarette lighter (They still call them that? or am I showing my age!) and give you instant battery reading for volt / amp. Several come with cell phone usb charge ports built in. Amazon $10
Gary & Joan Lee
Passing Wind
Com Pac 16 ll

Offline Bob23

  • I'm a mean and selfish curmudgeon! - Bob23
  • Fleet Admiral
  • Commodore
  • ******
  • Posts: 6180
  • Karma: 113
  • All men die; few men really live.
Re: Battery volt meter
« Reply #1 on: July 10, 2017, 05:07:43 PM »
Thanks. I'm gonna get me one.

Offline rogerschwake

  • Captain
  • *****
  • Posts: 209
  • Karma: 5
Re: Battery volt meter
« Reply #2 on: July 10, 2017, 06:01:33 PM »
  I've been using one of these for a couple years with no problems. When it goes below ten volts I charge the battery. The battery will run a depth finder auto helm and a couple hours of LED lights for more than five days. Give one a try there cheep.

ROGER

Offline DsquareD

  • Foredeck Crew
  • *****
  • Posts: 50
  • Karma: 5
Re: Battery volt meter
« Reply #3 on: July 10, 2017, 10:52:29 PM »
My dad gave me one once and I have no idea where I placed it. I never had need of it before.

Thanks for the tip.
Face your fears. Chase your dreams.

Offline deisher6

  • Commodore
  • ******
  • Posts: 742
  • Karma: 23
Re: Battery volt meter
« Reply #4 on: July 11, 2017, 08:26:50 AM »
Hey Gary and Joan Lee:
Thank you for the tip.  A voltmeter has been on my to do list for the past 4 years.  What kind, where to mount, how to wire, all caused procrastination.

Ordered one last night, problem solved.

Thanks again.

regards charlie

Offline Wes

  • Commodore
  • ******
  • Posts: 804
  • Karma: 37
Re: Battery volt meter
« Reply #5 on: July 11, 2017, 12:35:29 PM »
Roger - not sure if there's a typo in your post, but discharging a lead-acid battery to 10 volts is likely to seriously shorten its life. The rule of thumb for battery health is never to discharge below 50% state of charge, which would be 12.1 volts for conventional flooded lead acid.

Compass Marine has great info about batteries; see this post and others on their web site:

http://www.pbase.com/Maine cruising/battery_state_of_charge

Wes
"Bella", 1988 CP 19/3 #453
Washington, North Carolina