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Home/INIU/B-Series/INIU B42 18W 20000mAh Power Bank — Compact PD 3.0 QC4.0+ Portable Charger
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B-Series
INIU B42 18W 20000mAh Power Bank — Compact PD 3.0 QC4.0+ Portable Charger
4.0 (8)
$69.00$34.50
The INIU B42 18W 20000mAh power bank delivers safe PD 3.0 QC4.0+ fast charging in the most compact 20000mAh body — buy online today at $34.50, down from $69.00, with code LEAF10 for an extra 10% off.
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22 people are viewing this item.16 sold today.Only 6 left in stock.
INIU B42 18W 20000mAh Power Bank — $34.50 Online Deal
The INIU B42 is the SAFE Fast Charge Pro trusted by over 38 million global users — the best fit for commuters, students, and travelers who need dependable multi-day phone charging. Buy online now for $34.50, 50% off the $69.00 compare-at price, with coupon LEAF10 for another 10% off.
Charging Speed Answer
A full recharge of the B42's 20000mAh battery typically takes around 6–7 hours with an 18W PD/QC input charger. On output, the 18W PD 3.0 QC4.0+ port takes an iPhone 13 from 0 to 50% in about 25 minutes — roughly 1.5X faster than regular 2.4A chargers.
Can It Charge an iPad?
Yes. The 18W PD output charges iPads steadily, though full-speed iPad charging favors higher-wattage INIU models. It comfortably tops up tablets, and recharges a Samsung Galaxy S22 Ultra roughly 3 times from a full 20000mAh battery.
Specifications
Brand: INIU
Model: B42 (B-Series)
Capacity: 20000mAh
Output: 18W PD 3.0 / QC 4.0+
Size: 5.3 × 2.7 × 1.0 in; Weight: 12.3 oz
Battery: Aviation-grade high energy density cells
Price & Deal Value
Current price: $34.50 — save $34.50 vs. $69.00. Apply the LEAF10 coupon for additional savings; free shipping on orders over $45.
Best Fit Shoppers
iPhone and Galaxy owners wanting affordable 20000mAh capacity with proven INIU safety — under $35.
Features
18W PD 3.0 QC4.0+ takes iPhone 13 from 0–50% in 25 min — fast charging at just $34.50, 50% off $69.00
Most compact 20000mAh design with aviation-grade cells — premium capacity with major discount savings
Backed by INIU's 38-million-user safety record — trusted value plus LEAF10 coupon for extra savings
Output: 18W PD 3.0 / QC 4.0+
Weight: 12.3 oz
Capacity: 20000mAh
Dimensions: 5.3 × 2.7 × 1.0 in
Product Type: Portable charger / power bank
Current Price: $34.50 USD
Model / Series: B42 (B-Series)
Seller: AmpLeaf Goods
Product Details
INIU B42 — Safe, Compact 20000mAh Power at $34.50
Trusted by 38 million users worldwide. Buy online for $34.50 — half the $69.00 list — plus LEAF10 coupon savings.
Use Cases
Daily carry: about 3–4 full phone recharges per charge cycle
Travel: compact 12.3 oz body fits any bag
Fast top-ups: iPhone 0–50% in about 25 minutes
How It Compares
Regular 2.4A chargers and generic 20000mAh banks charge roughly 1.5X slower. The B42 adds PD 3.0/QC 4.0+ speed and INIU safety at a deal price under $35.
Order Today
Free shipping over $45. Standard shipping $8.00. Get the $34.50 sale price while it lasts.
Frequently Asked Questions
How long does it take to fully charge the INIU B42 20000mAh power bank?
A full recharge typically takes about 6–7 hours using an 18W PD or QC input charger. Slower 5V/2A wall chargers can take noticeably longer.
Is 18W enough to charge an iPad with the INIU B42?
Yes — the 18W PD output charges iPads steadily and reliably. For the fastest iPad charging, consider INIU's 65W or 140W models.
How many times can the INIU B42 charge a Samsung Galaxy S22 Ultra?
From a full 20000mAh charge, expect roughly 3 full recharges of a Galaxy S22 Ultra, with a little reserve depending on usage.
How much does the INIU B42 cost?
The current online sale price is $34.50, down from the $69.00 compare-at price — a 50% discount. Apply the LEAF10 coupon for an extra 10% off.
Where can I buy the INIU B42 at the best deal?
Buy it online here at AmpLeaf Goods — $34.50 with coupon LEAF10 savings and free shipping on orders over $45 makes this the most affordable offer.
4.0★★★★★★★★★★(8)
5 ★3
4 ★3
3 ★1
2 ★1
1 ★0
Customer Reviews
8
★★★★★★★★★★5.0
b****p
Verified
Charges my phone four times on one fill
The 20,000mAh capacity is no joke. I get roughly four full charges on my iPhone and it supports fast charging so I'm not waiting around. It's also noticeably slimmer than my old 20,000mAh brick from another brand. Excellent value at under $35.
★★★★★★★★★★4.0
q***t
Verified
Reliable daily driver
I've had this for about five months of daily use and it hasn't skipped a beat. Fast charging works as advertised with my Pixel. It takes a while to recharge the bank itself overnight, but that's expected at this capacity. Would buy again.
★★★★★★★★★★5.0
b**i
Excellent
Compact, powerful, dependable. Exactly what I needed.
★★★★★★★★★★3.0
e***d
Verified
Decent, but recharging it is slow
Charges my devices quickly and holds a ton of power. The downside is refilling the bank itself takes hours since 18W input isn't super fast. If you can charge it overnight like I do, it's a non-issue. Otherwise consider a higher-watt model.
★★★★★★★★★★4.0
c**x
Verified
Great for long flights
Used this on a 14-hour flight to Tokyo and my phone and tablet both stayed alive the whole way. It's compact enough to fit in the seat pocket. The safety features INIU advertises gave me peace of mind. Only minor gripe is the flashlight feels a bit gimmicky, but some may like it.
★★★★★★★★★★5.0
l**n
Verified
Saved my camping trip
Three days off-grid and this power bank kept my phone, headlamp, and speaker charged. It held its own charge the whole time despite cold nights. Rugged little thing with a nice matte finish that doesn't show scratches. I'm buying a second one for my glovebox.
★★★★★★★★★★4.0
j*c
Verified
Good value for capacity
For the money this is hard to beat. The compact design for 20,000mAh is real, it fits in my camera bag side pocket. My only note is that the USB-A port is slower than the USB-C, so use the C port when speed matters.
★★★★★★★★★★2.0
r**k
Mine arrived with a defect
Right out of the box it would only charge to about 80% and got warm doing it. INIU support was quick to arrange a return, which I appreciate, but my experience with this particular unit wasn't great. Might have just been a bad egg since reviews are otherwise strong.
