- First Name
- Cliff
- Joined
- Nov 15, 2021
- Threads
- 4
- Messages
- 1,381
- Reaction score
- 2,391
- Location
- San Angelo
- Vehicle(s)
- Bronco
- Your Bronco Model
- Wildtrak
I use a NOCO GB251 24V pack to start my PT6A-34, and it works every bit as well as my old Aero Specialties 4800A GPU that cost several thousand and needed to be wheeled out on its own cart. Voltage levels during startup remain in the same threshold and spool up time is identical with either pack. The NOCO has 1/0ga cables and they get pretty warm after use. I have to use the bypass every time with the pack because it's a relay isolated GPU plug that needs to be powered before it connects to the battery itself. I wouldn't buy a pack without that feature regardless though. I run the smaller GBX75 in my Bronco, it basically stays connected to the rear power point and always stays charged up ready to go. I've used it to start my V8 4runner that had a completely dead battery (was dead for like half a year), and it started up like it was just running five minutes before with a brand new battery installed. It really is surprising what these little packs can do.
The 8ga wire isn't what I'd call ideal, but it's likely adequate for what people would need this pack for. The battery pack could be up to the task, however...modern lithium packs can push up to 120C continuous discharge (often twice as much burst discharge), meaning you'd only need a max size of 33AH battery to get a true 4000A continuous, for maybe 10-15 seconds anyway. Instantaneous, you'd really only need 16AH to get a burst discharge rate of 4000A. All that to say, yes there are jump starters out there, even on amazon of all places, that will push their stated power out of a relatively insignificant looking battery pack. Even this one could push out well over 5000A if they were using a 120C 24AH battery with a 240C burst rating. Most of that rating is insignificant if you're not drawing that much power, but it's available for a very short time if you do. With that in mind, the 8ga wire is probably going to be enough to get a modern vehicle started, but it won't be ideal if it's an older vehicle that needs to be cranked a lot (like a diesel truck that you ran out of fuel and needs time to prime the pump). And just for the record, most lipo batteries have always been rated in mAH until you get up into large packs assembled by a third party seller. Pull any pack apart that you want, whether it's from Bosch or Milwaukee or it's a lithium car battery, if it's labeled in AH on the outside, the individual cells will be labeled in mAH, guaranteed. It's not a marketing tactic, the battery manufacturers label the cells as such, it's just industry standard and they assume people know how to drop zeroes if they care about comparing actual specs.
I'm not saying this particular pack lives up to all of its claims, it's probably slightly exaggerated like any other electronic device outside of a lab, but I'm seeing nothing about it that would prevent it from getting reasonably close to reaching those claims in practice. Maybe it can only put out an honest 3600A burst, who knows, but that won't make a difference in real world use when starting a Bronco that won't need but 1/10th of that current for half a second. The clamps and form factor and bypass features and price and things of that nature will make more of a functional difference in user experience than peak ratings.
The 8ga wire isn't what I'd call ideal, but it's likely adequate for what people would need this pack for. The battery pack could be up to the task, however...modern lithium packs can push up to 120C continuous discharge (often twice as much burst discharge), meaning you'd only need a max size of 33AH battery to get a true 4000A continuous, for maybe 10-15 seconds anyway. Instantaneous, you'd really only need 16AH to get a burst discharge rate of 4000A. All that to say, yes there are jump starters out there, even on amazon of all places, that will push their stated power out of a relatively insignificant looking battery pack. Even this one could push out well over 5000A if they were using a 120C 24AH battery with a 240C burst rating. Most of that rating is insignificant if you're not drawing that much power, but it's available for a very short time if you do. With that in mind, the 8ga wire is probably going to be enough to get a modern vehicle started, but it won't be ideal if it's an older vehicle that needs to be cranked a lot (like a diesel truck that you ran out of fuel and needs time to prime the pump). And just for the record, most lipo batteries have always been rated in mAH until you get up into large packs assembled by a third party seller. Pull any pack apart that you want, whether it's from Bosch or Milwaukee or it's a lithium car battery, if it's labeled in AH on the outside, the individual cells will be labeled in mAH, guaranteed. It's not a marketing tactic, the battery manufacturers label the cells as such, it's just industry standard and they assume people know how to drop zeroes if they care about comparing actual specs.
I'm not saying this particular pack lives up to all of its claims, it's probably slightly exaggerated like any other electronic device outside of a lab, but I'm seeing nothing about it that would prevent it from getting reasonably close to reaching those claims in practice. Maybe it can only put out an honest 3600A burst, who knows, but that won't make a difference in real world use when starting a Bronco that won't need but 1/10th of that current for half a second. The clamps and form factor and bypass features and price and things of that nature will make more of a functional difference in user experience than peak ratings.
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