- #1
WeeHooker
- 3
- 0
Hi Gents, new guy here. I'm an ME by degree ( 25 years ago.) but it's been a while since I've done any real number crunching. ( Got moved to management.) Especially in EE areas. So here is my question.
I have a couple of small 12V lead acid batteries in the 2.5-7Ahr range that I use to power my electronics on my kayak. ( Commonly sold as emergency light/APC back-up batteries.). Occasionally, I'll go on extended camping trips to places where I may not have 115V shore power to charge them. SO I'm thinking that a pair of leads to my truck battery should do the job on these occasions.
That said, I'm wondering:
a) will the depleted yak battery charge too fast /get damaged if I jumper it to my trucks battery and 115A charging circuit? If so, would using 12 ga or smaller wire slow the process?. Maybe partially charge with truck/alternator off?
b) How long would it take to charge a 7 ahr battery in this fashion? I'm thinking minutes vs hours?
Any insight appreciated!
Dave
I have a couple of small 12V lead acid batteries in the 2.5-7Ahr range that I use to power my electronics on my kayak. ( Commonly sold as emergency light/APC back-up batteries.). Occasionally, I'll go on extended camping trips to places where I may not have 115V shore power to charge them. SO I'm thinking that a pair of leads to my truck battery should do the job on these occasions.
That said, I'm wondering:
a) will the depleted yak battery charge too fast /get damaged if I jumper it to my trucks battery and 115A charging circuit? If so, would using 12 ga or smaller wire slow the process?. Maybe partially charge with truck/alternator off?
b) How long would it take to charge a 7 ahr battery in this fashion? I'm thinking minutes vs hours?
Any insight appreciated!
Dave