HARPER PB-20000 — an overview of an external battery with characteristics

Content

Information about Harper PB-20000

Specifications

Design — plastic under the metal, similar to a large smartphone

The com­plete set of HARPER PB-20000 is not gen­er­ous. A trans­par­ent blis­ter with a card­board insert con­tains a case, a USB-micro-USB cable, as well as instruc­tions in Euro­pean and a war­ran­ty. The wire is round, about 20 cm long — the loss­es should be small.

The pro­por­tions of the case are made in the spir­it of the time — 2:1 (162 × 81 mm), which fur­ther enhances the sim­i­lar­i­ty of the device with a huge smart­phone, only the cor­pu­lence of 22 mm puz­zles.

Accord­ing to the man­u­fac­tur­er, lithi­um-poly­mer cells are used in the device, their sizes are not lim­it­ed to cups, the shape can be arbi­trary.

In the hand, the bat­tery feels like a healthy blank, its weight is twice the aver­age phone — 413 g.

The case looks styl­ish, at first glance it is per­ceived as met­al, but all the pan­els are plas­tic, not exclud­ing the shiny pip­ing. The top cov­er is dec­o­rat­ed with a grid of dot­ted recess­es, the back is mat­te.

At the top of the device is a bluish LED dis­play that shows the per­cent­age of charge, cur­rent and direc­tion of its flow (in / out). The num­bers are leg­i­ble in any light. A small sil­ver but­ton for check­ing the charge lev­el is placed on the right side. The out­put con­nec­tors are locat­ed on the upper end of the case, the input one did not fit there, it was moved to the left edge. A flash­light is not pro­vid­ed.

Connectors HARPER PB-20000

Inter­ac­tion with exter­nal devices is imple­ment­ed through four inter­faces. Through the micro-USB input sock­et, the cur­rent enters the bat­tery, its lim­it val­ue is 2A. QC fast charg­ing is not imple­ment­ed.

I am very pleased that they pro­vid­ed three out­put sock­ets — this is bet­ter than the usu­al two. The ports are not equiv­a­lent, the first is lim­it­ed by a cur­rent of 1A, the oth­er two are lim­it­ed by a cur­rent of 2.1A.

The bat­tery has built-in pro­tec­tion against short cir­cuit, over­heat­ing and over­volt­age.

You can charge your tablet, phone and GoPro cam­era at the same time, the applied Smart IC chip will give each device as much pow­er as it can digest. True, there are no mir­a­cles in the bud­get seg­ment, there is a lim­i­ta­tion — the total cur­rent for all ports should not exceed 2.4A. Oth­er­wise, the con­troller will reduce the pow­er sup­ply and the charg­ing time will increase.

Capacity — good performance even with losses

The declared capac­i­ty of the HARPER PB-20000 exter­nal bat­tery is 20,000 mAh, lithi­um-poly­mer cells are used, the num­ber of charge / dis­charge cycles of which reach­es 500, when charged once a week, this is enough for almost 10 years.

The actu­al val­ue of the giv­en charge will be low­er, due to loss­es in the con­ver­sion cir­cuits. Mea­sure­ments by YuES­Bi-doc­tor give an out­put capac­i­ty of about 15,000 mAh, which is not bad for an inex­pen­sive device (loss­es are less than 30%).

There is no fast charg­ing, so fill­ing the bat­tery itself with the max­i­mum allowed cur­rent takes about 12 hours. The time for which smart­phones and tablets are sat­u­rat­ed will also be stan­dard for them — it depends on the inter­nal bat­ter­ies.

The avail­able capac­i­ty is very decent, it allows you to charge Alca­tel 1 (2000 mAh) for at least a whole week (up to 7 times), ZTE Blade A530 (2600 mAh) — five times, Xiao­mi Mi Max 3 (5500 mAh) — twice.

conclusions

The HARPER PB-20000 exter­nal bat­tery attracts with its appear­ance, rem­i­nis­cent of a large smart­phone. A large gad­get looks sol­id and will not be an alien ele­ment even in an A‑class office.

It is con­ve­nient that the charge is dis­played not with abstract dots, but with nor­mal num­bers — it is always clear how much is left, is it time to con­nect to the out­let.

We also write down three out­put ports as plus­es — with a decent capac­i­ty of 15 A * h, the simul­ta­ne­ous dis­tri­b­u­tion of a charge is only wel­come. The exist­ing restric­tions in the form of slow charg­ing or cur­rent lim­it on the ports are not crit­i­cal, most users will not notice them.

Rec­om­mend­ed for office work­ers, stu­dents and trav­el­ers — any­one who needs long auton­o­my.

pros

• Three out­put ports instead of the tra­di­tion­al two
• Bright dig­i­tal indi­ca­tor shows the exact charge lev­el
• Good real capac­i­ty con­sid­er­ing loss­es

Minuses

• No flash­light, not suit­able for tourists and explor­ers
• No fast charg­ing, fills up to half a day
• The total charge cur­rent of all devices is lim­it­ed to 2.4 A