BOOKOO via Amazon has
Bookoo 12V 20000mAh 4500A Portable Car Jump Starter Box (Red/DC 4500A) on sale for $49.99 - 44% Off ($22) with promo code
9PTB2J2M at checkout =
$27.99.
Shipping is free.
Thanks to Deal Hunter
Navy-Wife for sharing this deal.
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Product will be sold by BOOKOO and fulfilled by Amazon
Details:
- H8 jump starter: 4500A peak current and 20000mAh battery; starts gas engines and up to 10.0L diesel engines in seconds
- Operates in wide temperature range: -4°F to 122°F (-25°C to 50°C)
- Fast recharge via USB-C (5V/3A, 9V/2A max) in approximately 4 hours; holds charge for long periods
- 10 safety protections including spark-proof and reverse polarity prevention for safe 12V vehicle connections
- All-in-one emergency tool: 3-mode ultra-bright LED light (steady, strobe, SOS) and USB QC 3.0 output for charging phones/tablets
- Rugged waterproof design with protective storage cover and intuitive clamps
- Tips: Ensure power >50% before jump-starting; recharge every 3 months if unused for extended time
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16 Comments
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Price have dropped a good deal on these too.
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It's true that LiFePO4 batteries have a lower nominal cell voltage (3.2V) compared to Li-ion (3.7V) - and have a tighter, more linear OCV - but they're both wired in series to get something within the range the car needs. LFP would be 12.8-14.4V whereas lithium ion is more like 14.8-16.8V.
LFP has no problem at all providing the voltage the overwhelming majority of cars and trucks need. In fact, Li-ion is somewhat higher than necessary.
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