# Charger QOLTEC 36V–42V 4A for e-bike, DC plug 5.5×2.1 mm

**URL:** https://aio.lv/en/product--qoltec-52612--11688244
**Data updated:** 2026-02-16 07:13 (EET)
**Category:** Battery chargers
**Manufacturer:** QOLTEC
**Manufacturer code:** 52612
**EAN:** 5901878526126
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 29.99 €
**Prices and availability valid until:** 2026-07-11 23:59
**Price without VAT (21%):** 24.79 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--qoltec-52612--11688244

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 25.06.2026 | free |
| Pickup points | 30.06.2026 | 1.99 EUR |
| Courier delivery to door | 30.06.2026 | 4.99 EUR |

## Summary description

QOLTEC charger for e-bike designed for batteries with nominal voltages 36V–42V and maximum output current 4A. Fitted with a 5.5×2.1 mm DC plug, it provides regulated charging suitable for typical e-bike battery packs. Use it to recharge lithium or lead-acid packs within the specified voltage range, offering reliable power delivery for daily commuting and recreational rides.

## Long description

QOLTEC 36V–42V 4A charger is a regulated external power supply designed for recharging e-bike battery packs with nominal voltages in the 36–42 V range. Equipped with a standard 5.5×2.1 mm DC plug, the charger delivers up to 4 A of output current and provides stable voltage regulation to support repeated daily charging cycles for commuting and recreational electric bicycles. The compact housing and integrated cable make it suitable for use at home, in the workshop, or when storing the bike between rides.
Advantages
The charger offers steady current output and voltage regulation to reduce the risk of overcharging and to support the safe restoration of lithium and lead-acid battery packs within the specified voltage range. Its universal 5.5×2.1 mm DC connector fits many e-bike battery sockets or intermediate adapters, while the 4 A maximum current provides a balance between charging speed and battery longevity. The unit's compact design and standard mains connector simplify storage and connection.
Suitable for
 Charging e-bike battery packs with nominal voltage 36 V to 42 V
 Home and workshop battery maintenance and topping up
 Daily commuters and recreational cyclists needing reliable overnight charging
 Use with battery systems compatible with a 5.5×2.1 mm DC plug
Key specifications
 Input: standard AC mains voltage (country dependant)
 Output voltage range: suitable for nominal 36 V–42 V battery packs
 Maximum output current: 4 A
 Output connector: 5.5×2.1 mm DC plug
 Regulated output for consistent charging
 Enclosure: compact external power supply design
How to use
Connect the charger to the AC mains using the appropriate country mains lead, then plug the 5.5×2.1 mm DC connector into the compatible socket on the e-bike battery or its external charging port. Ensure the battery nominal voltage falls within the 36–42 V range before beginning charge. Monitor the battery and charger during initial use to confirm correct connection and charging behavior. After the battery reaches the manufacturer-recommended charge level, disconnect the charger first from the battery and then from the mains.
Usage recommendations
Use the charger only with batteries rated for 36–42 V and compatible with a 5.5×2.1 mm DC input. Avoid exposing the charger to moisture, extreme temperatures, or direct sunlight during operation. For longest battery life, follow the battery manufacturer's charging instructions and avoid prolonged storage at full charge.

## FAQ

### How much does the QOLTEC e-bike charger 36V–42V 4A cost, and is it available for purchase?

The price is 29.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 26 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 25.06.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All QOLTEC products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized QOLTEC service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11688244/67041394_large.webp