Portable power supply virtual standard disaster area! Teach you three tricks to quickly identify: weight/conversion rate/certification can not be less.
There are a lot of chaos in the portable power supply in the market: tens of thousands of milliamps are ultra-low-priced, ultra-thin and ultra-large-capacity, and fast-charging gimmicks are flying all over the sky. It is normal that the capacity is empty, the power is faked and the batteries are inferior. Without professional equipment and three hard-core methods, ordinary people can easily distinguish between true and false without wasting money.
Weight can't be hidden, and weight can't fool people.
The density of lithium battery is fixed, and the real capacity and weight are strictly linked, which is the simplest method to identify counterfeit.
10000mAh regular model: about 180-230g.
20000mAh regular model: about 350-420g.
30000mAh regular model: over 500g.
Key points of pit avoidance:
Ultra-thin, light fuselage, but nominal 30 thousand, 40 thousand milliamps, directly determine the virtual standard; The lighter the same capacity, the worse the battery cell and the more serious the shrinkage.
② Calculate the conversion rate | Understand the real available electricity.
Merchants will only mark the nominal capacity of batteries and deliberately hide the loss.
Charging treasure boosting and line heating will consume electricity, and the industry qualified conversion rate is 60%-75%.
Simple formula:
Actual available capacity = nominal capacity × 0.6 ~ 0.75
For example:
Nominal 20000mAh, the actual use is only 12000～15000mAh.
If the charging times are seriously less, the power failure is fast, and the fuselage is hot, it is a low-quality virtual standard.
(3) check certification | safety bottom line, (3) no direct blackouts.
Virtual labels and miscellaneous brands are basically undetected and unprotected, which is easy to bulge and spontaneously ignite.
Mandatory hard certification:
3C compulsory certification: just needed for domestic sales, safety foundation
UN38.3 certification: batteries are compliant and can be carried on board.
The body and outer packaging of regular products will be clearly marked with parameters, brand and certification logo；;
No logo, no parameters, no certification, no online celebrity brand, no matter how cheap.
