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Gear Review · Energy

Feeke 36,800mAh Solar Power Bank.

A $12 power bank that claims 36,800mAh in a package weighing 280 grams. The math does not work. Here is what it actually delivers and whether the low price justifies the gap between the label and the battery.

Price

~$12–$25

Claimed

36,800 mAh

Likely actual

~8,000–15,000 mAh

NWS Verdict

Pass for preparedness

Strengths

Priced as low as $12, it delivers some charging capability at minimal cost.
The dual flashlights are consistently praised as bright and useful.
Compact at 5.5 by 3 inches and light at 280 grams.

Limitations

The 36,800mAh claim is physically impossible at this weight. Actual capacity appears to be one-quarter to one-third of the label.
No safety certifications listed. No UL2056, no Qi certification.
The labeled capacity creates an airline compliance problem: 136 Wh exceeds the FAA 100 Wh limit.
The solar panel is too small to produce meaningful charge.

What it is

A small, cheap power bank with a large, false capacity claim

The Feeke (model YD-886) is a compact portable power bank with a single integrated solar panel, two USB-A output ports with QC 3.0, one USB-C input/output port, one Micro-USB input port, dual LED flashlights, and a compass. It measures 5.5 by 3 by 0.7 inches, weighs approximately 280 grams (9.9 ounces), and is built with ABS, polycarbonate, and silicone with rubber port covers.

The product is manufactured by Shenzhen Jincheng Electronic Technology Co., Ltd. and distributed through an ODM arrangement. The YD-886 model number appears on units sold under other brand names with identical designs, dimensions, and feature sets. The brand label changes; the product inside does not appear to.

The listed "original price" varies wildly on Amazon, from $49.99 to as high as $299, with coupons and deals bringing it to $12 to $25. The inflated MSRP is a pricing tactic, not a reflection of the product's value or manufacturing cost.

The capacity question

At 280 grams, 36,800mAh is not possible

This is the most clear-cut capacity case in the solar power bank category. The entire product weighs 280 grams. That weight includes the ABS case, the solar panel, two flashlight LEDs, a compass, the circuit board, four port connectors, port covers, and the battery. The battery itself weighs less than 280 grams.

Current lithium-polymer cells achieve roughly 250 to 270 Wh/kg at their theoretical maximum. At 280 grams of pure battery (which this is not), the maximum possible energy would be about 75 Wh, or roughly 20,000 mAh at 3.7V. Subtract the weight of everything that is not battery, and realistic estimates put the actual cell capacity at 8,000 to 15,000 mAh.

A buyer who purchased six units and tested them with a 4,000mAh Xiaomi phone reported getting only about 1.5 full charges per unit. That suggests actual capacity in the 6,000 to 8,000 mAh range, roughly one-fifth of the advertised number.

For comparison: an Anker PowerCore 10,000mAh weighs 180 grams and costs about $20 with no solar panel, no flashlight, and no inflated capacity number. It gives you roughly the same real-world charging as the Feeke, with specs you can trust.

What owners actually say

People who expected a flashlight are happy. People who expected 36,800mAh are not.

Amazon reviews split along a predictable line. Casual buyers who treat it as a cheap flashlight with a USB port rate it well. The flashlights are genuinely bright, the compass works after calibration, and the rubberized construction feels durable in the hand.

Buyers who tested the capacity are much less generous. DansDeals commenters called it "a scam and complete false advertisement" and estimated the real capacity at 10,000 to 15,000 mAh based on weight. Multiple Slickdeals commenters in the broader solar power bank category describe products at this weight and price point as "e-waste" and warn that advertised capacities in this range are "super duper false."

On solar, there is nothing new to report. A single small panel at this size produces roughly 1 to 1.5 watts, the same as every other single-panel competitor. No owner reports meaningful solar charging. The product itself does not appear to advertise the solar wattage anywhere on the listing.

The one thing to know

How to verify any power bank's capacity before you buy

The Feeke teaches one lesson that applies to every power bank purchase: check the weight. Lithium-polymer cells have a known energy density ceiling. A product that claims more milliamp-hours than its weight allows is overstating its capacity, full stop. Here is the quick math:

Convert the product weight from ounces to grams. Subtract a reasonable estimate for the case, circuit board, and other components (50 to 100 grams for a small unit, 100 to 150 for a rugged one). Multiply the remaining battery weight in kilograms by 250 Wh/kg. Divide by 3.7V. That is the theoretical maximum milliamp-hour capacity. The real number will be somewhat lower.

If the advertised capacity is more than 20% above that number, the listing is not telling the truth. If it is double, the listing is making up numbers. The Feeke's advertised capacity is roughly three to five times what the physics allow.

How it fails, and what it costs over time

Cheap to replace, impossible to trust

Failure modes are the same as any budget lithium-ion product: gradual capacity loss, eventual inability to hold charge, possible swelling if exposed to excessive heat. Without any stated safety certification, you are relying on the manufacturer's quality control, and a product that misrepresents its primary specification does not inspire confidence in the rest of its engineering.

At $12 to $25, replacement cost is not the issue. The cost is in planning: if your emergency kit assumes 36,800 mAh of portable power and the battery actually holds 8,000 mAh, your plan has a gap large enough to matter. That gap is invisible until you need the charge and do not have it.

Who should skip this

Anyone building an emergency plan

Emergency preparedness requires gear you can plan around. The capacity number on this product is not something you can plan around. If your household's power-outage checklist says "portable power bank" and you fill that slot with a Feeke, you are planning on four to five phone charges and getting one to two.

If you fly regularly, the label creates a separate problem. At 36,800 mAh and 3.7V, the printed capacity calculates to 136 watt-hours, which exceeds the FAA's 100 Wh carry-on limit. Whether the actual capacity is below that threshold is not the conversation you want to have at airport security.

The Feeke has a role as a cheap flashlight with a USB port for a glove box or a camping bag where expectations are low. It does not have a role in a preparedness kit where capacity matters.

What to buy instead

Three products with honest specs

Hiluckey T11W (~$28–$47) — honest capacity, real solar

25,000 mAh that appears genuinely rated, four folding panels at 5 to 6 watts, airline-safe at 92.5 Wh, tested by OutdoorGearLab. Costs more, weighs more, and delivers what the label says. Read our review.

BLAVOR PN-W12 (~$45–$55) — fast charging, UL2056 certified

20,000 mAh with PD18W/QC3.0 fast charging, 10W wireless, and stated UL2056 safety certification. Transparent about solar limitations. Read our review.

Anker PowerCore 10,000 (~$20) — no solar, verified capacity

No solar panel, no flashlight, no compass. Just an honest 10,000 mAh at 180 grams from a brand with rigorous testing, real certifications, and a warranty. Roughly the same actual capacity as the Feeke claims three times over, for $8 more.

Common questions

Does the Feeke really hold 36,800mAh?

No. The unit weighs approximately 280 grams total, including the case, solar panel, flashlights, compass, and all electronics. Even if the entire weight were pure lithium-polymer battery, the theoretical maximum at current energy density would be roughly 10,000 to 15,000 mAh. A buyer who tested six units reported getting only about 1.5 full charges on a 4,000 mAh phone, suggesting actual capacity in the 6,000 to 8,000 mAh range.

Is the Feeke the same product as units sold under other brands?

The Feeke YD-886 shares a model number with units sold under other brand names, and all appear to originate from the same Chinese ODM manufacturer. The external design, dimensions, and feature set are identical across the branded variants. The brand name on the label may differ, but the product inside appears to be the same.

Can you take the Feeke on an airplane?

This is awkward. The label claims 36,800 mAh, which at 3.7V would equal 136 watt-hours and exceed the FAA 100 Wh carry-on limit. The actual capacity is almost certainly well below 100 Wh. A TSA agent who reads the label and does the math may pull it. Products with honest capacity labeling avoid this problem entirely.

Is the Feeke worth buying at its sale price?

At $12 to $15 with a coupon, it functions as a small power bank with a bright flashlight and a compass. If you think of it as a 10,000 mAh power bank with bonus features at a deep-discount price, the value is not terrible. If you are planning emergency power around the number on the box, the gap between what it claims and what it delivers could leave you without a charged phone when you need one.

NWS recommendation

NWS cannot recommend the Feeke for emergency preparedness. A product whose primary specification is overstated by three to five times is not something to build a plan around. For a glove-box flashlight with a USB port, the $12 price is fine. For a preparedness kit, spend the extra $15 to $35 on a product with honest capacity from the Hiluckey, BLAVOR, or Anker.

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