Save to shopping list
Create a new shopping list
Self-assembly battery - Polly DP-21700-7 48V 13s5p 25Ah with charger and BMS

Self-assembly battery - Polly DP-21700-7 48V 13s5p 25Ah with charger and BMS

  • Rated voltage: 48V, Rated capacity: 25Ah 1200Wh
351,26 €
incl. VAT / pc
Express checkout 1-Click(without registration)
14 days for easy returns
This product is not available in a stationary store
Safe shopping
Free delivery to parcel machinesMore information
Smile - deliveries from online stores when ordered from €10.68 are for free.
You buy and delivery is free!
deliveries from online stores are free when you order €10.68 are for free.
Free delivery includes parcel delivery to a parcel machine

Self-assembly battery - Polly DP-21700-7 48V 13s5p 25Ah with charger and BMS

Product for advanced users.

The maximum discharge current is 35A

You do not know if the battery case will fit into your bicycle frame? Download the templates and print it in a 1:1 scale, after printing, check that both marked dimensions of 50mm are consistent with reality, otherwise the housing could be printed in a different scale and the dimensions will not match.

Download the template

Advantages of assembling the battery yourself:

You save up to several hundred PLN
1. You save up to several hundred PLN on the cost of the battery. An ordinary soldering iron is enough for assembly (we recommend the cheapest soldering station for about PLN 100). We estimate the duration of the assembly at about 1 hour for an inexperienced user. Our service department is there to help and know if you run into any problems.
You gain unique knowledge
2. You gain new, unique knowledge. You know what you buy. You learn how the battery works and how it is built, so you know how to care for it better, and it will repay you with a longer failure-free operation.
You save in the future
3. If you are going to build another electric bike for your family or friends or you will be willing to buy a second battery to increase the range - the ability to build yourself will result in further, even greater savings and another portion of interesting knowledge in the new hobby of electric bikes.

The kit includes:






Suggested place of BMS assembly


Laser cut pure nickel plates.


Technical data:

Rated voltage: 48V
Rated capacity: 25Ah 1200Wh
Cell type: LG M50T (5000mAh)
Cell configuration: 13s5p
Maximum discharge current: 35A (maximum performance of the connected controller)
Maximum charging current: 2.5A (maximum efficiency of the charging socket)
Charger port: DC 2.1 / 5.5
Weight: 5,9 kg
Dimensions: 156x95x367mm
Welding: on a professional welding machine, tape pure nickel 100%

To complete the construction of the battery you need:

1m 12 AWG red
1m 12 AWG black
1m 16 AWG red
1m 16 AWG black
15x10cm epoxy with a thickness of 0.2-0.5mm
Heat shrinkable Sleeve 6.4mm x 12cm
Heat shrinkable Sleeve 9mm x 10 cm
XT60 set
0.7 m spiral cable cover
10mm x 20m Kapton tape
1m, 20mm double-sided adhesive tape
100 ml silicone


Be sure to connect the charger to the batteries in the correct order. ALWAYS connect the charger to a 230V socket first and then to the charging socket. DO NOT connect upside down. This can quickly damage both the charger and the BMS installed in your battery. Reverse connection causes the effect of sudden charging of the output capacitors of the charger through the BMS socket. This is accompanied by the flow of huge current that can damage the plug, socket, BMS mosfets or even the charger transistors.

How to install the battery?

Write your opinion
Your opinion:
Add your own product photo:
IdoSell Trusted Reviews
4.91 / 5.00 529 reviews
IdoSell Trusted Reviews
Klarownie, sprawnie, szybko. Znakomicie zrealizowana sprzedaż. Pozdrawiam Tomasz z Peak Bike.
Nexunki jak zawsze wszystko ok
This page uses cookie files to provide its services in accordance to Cookies Usage Policy. You can determine conditions of storing or access to cookie files in your web browser.