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thataway
Joined: 02 Nov 2003
Posts: 21468
City/Region: Pensacola
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: thataway
Photos: Thataway
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 Posted: Sun Nov 29, 2015 1:32 pm Post subject: |
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There has been a lot of information on The Hull Truth about the small battery atterpack Lithium ion batteries, and one of the respected members sells one.
Yes, they will act as any booster pack and start an outboards. They don't have a huge amount of residual life. Any lithium ion battery pack will slowly self discharge, but certainly for more than a month, enough to start our batteries. (This is not specific to the units found at Costco).
There are any number of battery packs for recharging both USB devices and computers. I have owned a battery pack which will recharge my MacBook Air 3 times, for a number of years. I have several smaller packs which will double the life of the I phone.
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Bob Austin
Thataway
Thataway (Ex Seaweed) 2007 25 C Dory May 2018 to Oct. 2021
Thisaway 2006 22' CDory November 2011 to May 2018
Caracal 18 140 Suzuki 2007 to present
Thataway TomCat 255 150 Suzukis June 2006 thru August 2011
C Pelican; 1992, 22 Cruiser, 2002 thru 2006
Frequent Sea; 2003 C D 25, 2007 thru 2009
KA6PKB
Home port: Pensacola FL |
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hardee
Joined: 30 Oct 2006
Posts: 12637
City/Region: Sequim
State or Province: WA
C-Dory Year: 2005
C-Dory Model: 22 Cruiser
Vessel Name: Sleepy-C
Photos: SleepyC
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| Posted: Sun Nov 29, 2015 1:46 pm Post subject: |
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| Pandion wrote: |
Harvey, any idea how long that thing will hold a charge? And has anyone actually used one of these to start a boat engine?
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I have not used it to start anything (except ion this thread) but I got interested in it when the motorcycle shop used it to start my bike after they let it sit with the lights on and ran the battery down. It started it right up. That was the 3rd time they had used it for a bike that week without recharging it. They had also used it to start a customers car. The owner said he had used it to start his Ford F-150 before, (not on that same charge though).
It is lithium ion so should hold a charge for a pretty good time, but I don't know how long for sure.
I liked it because of the size and weight and various output possibilities, and that it can be charged on either 110AC or 12VDC from my cig plug on the boat or truck.
Harvey
SleepyC
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Though in our sleep we are not conscious of our activity or surroundings, we should not, in our wakefulness, be unconscious of our sleep. |
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williwaw
Joined: 05 Jan 2014
Posts: 148
City/Region: Portland
State or Province: OR
C-Dory Year: 2007
C-Dory Model: 23 Venture
Vessel Name: Williwaw
Photos: Williwaw
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| Posted: Sun Nov 29, 2015 2:14 pm Post subject: |
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I believe USB charger output is 5 volts with a quality charger outputting 2.1/2.4 amps or 10-12 watts. If you look at the 120 VAC charger that comes with the iPad, for example, it's only provides 12 watts. This is not high power stuff so, while possible, poor charging is unlikely to be a voltage drop issue.
More likely the problem is just that the device running navigation software with the display set to max brightness is using too much power. With my iPad running Navionics, the best I can do is maintain the charge over time and I know my wiring is good 
Btw, an easy way to add another 12 VDC socket to your dashboard area is to get an extension cord (like this) and hard wire it to fuse panel behind your helm. I just left the socket loose because it's rubber coated and behind my MFD so it don't notice it. Took me ten minutes to install and now I have a dedicated socket for my iPad. |
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dotnmarty
Joined: 03 Nov 2003
Posts: 4209
City/Region: Sammamish
State or Province: WA
C-Dory Year: 1993
C-Dory Model: 16 Angler
Vessel Name: LIZZIE II
Photos: Lizzie
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| Posted: Sun Nov 29, 2015 2:20 pm Post subject: |
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Harvey- you just solved my Christmas gift for my son. Thanks, now could you please get Santa to find a 14 footer for me? 
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MartyP
"...we're all in the same boat..." |
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Sunbeam
Joined: 23 Feb 2012
Posts: 3990
City/Region: Out 'n' About
State or Province: Other
C-Dory Year: 2002
C-Dory Model: 22 Cruiser
Photos: Sunbeam
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| Posted: Sun Nov 29, 2015 2:24 pm Post subject: |
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| Pandion wrote: |
Harvey, any idea how long that thing will hold a charge? And has anyone actually used one of these to start a boat engine?
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I haven't tried mine on the boat yet, but I have an Anti-Gravity XP-1 and it will start my V-10 "land engine" without any noticeable strain (I disconnected the battery cable and used just the Anti-Gravity to start it since my battery wasn't actually run down.) I have to think it's easier to start a boat engine since my boat starting battery is much smaller, although I'm no expert on the topic.
It seems to hold a charge quite well in storage, although I haven't kept meticulous records or anything, so no facts and figures on that.
The XP-1 also has a cigarette socket you can use with it (so I could charge my laptop, for example), plus the usual USB, etc. ports. That said, I keep it just for possible jump starting (has the typical jumper cable type alligator clips) so I don't use it for other purposes much. |
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