Why Does My Peak Battery Jumper Box Alternate Its Display From FL to 84?
Updated 11/10/2025 | Published 10/15/2021
Question:
Why does my Peak 600 display FL and 84 alternately?
asked by: Edward W
Expert Reply:
Whenever I hear of a battery giving off this type of feedback flashing from FL(fully charged) to 84(percent of charge) it tells me that the battery has lost its maximum capacity. The jumper box is alternating this as it attempts to charge and the battery says its fully charged but as the charging voltage is turned off it drops to the 84 you see as it can no longer hold a full 100% charge. The charger then kicks back on thinking it can charge back to 100.
You should replace it at this time and I recommend a NOCO Boost X Jump Starter # NOC48VR. This uses a more powerful lithium battery versus the lead acid type battery in your Peak jump box. The box is also much smaller and lighter making it easier to store and carry with you.
Product Page this Question was Asked From
NOCO Boost X Jump Starter - LED Work Light - 2 USB Ports - 12V - 1,250 Amp
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- Jump Starters
- ATV/Motorcycle
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- RV/Camper
- 1000 - 1999 amps
- Device Charger
- Work Light
- NOCO
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Don
11/10/2025
Is there a replacement battery for the Peak jumper?