Rules for every battery page

One page per battery model. Address: darkproject.eu/product/‹pack part number›, the same as in the QR code on the pack (procedure 3.2).
Open to everyone: no login, no app, no cookie wall over the content. Must load quickly on a phone.
Stays online for at least 10 years after the last unit with this battery is placed on the EU market. Replacement instructions stay online permanently (Art. 11(1)).
Content must be complete, up to date and accurate (Art. 13(6)). Show the update date and keep a change log.
Languages: English plus the language of every country where distributors sell. Pick the language from the browser and let the visitor switch (Art. 74(1), Art. 38(1)(a)).
Accessible: real text instead of images of text, text alternatives for symbols, contrast at least 4.5:1 (draft labelling act, Art. 6(3), refers to Directive (EU) 2019/882).
Batch number and date of manufacture stay on the battery. The page explains where to find them.
Who owns what: battery data and the declaration come from the battery manufacturer (the pack supplier) and are published by Dark Project under a written agreement (request item B3a). Device, replacement and spare-part content: Dark Project. Collection information per country: the distributor or its take-back scheme.
Update the page when: a new device model uses this pack; a country or distributor is added; the declaration changes; the EU labelling implementing act is published; a take-back scheme changes.

Battery information

For the rechargeable battery inside your Dark Project device. Published by Dark Project on behalf of the battery manufacturer, as required by EU Regulation 2023/1542.

Portable batteryRechargeable

YB-LP-405078-4000

Chemistry: Li-ion
Voltage: 3.7 V⚑
Capacity: 4000 mAh
Energy: 14.8 Wh⚑
Weight: 78 g⚑

Li-ion

Used in: NOVA 81 Wireless keyboard (ALU81AWL)

Updated 1 February 2027⚑, version 1.0⚑

RecommendedDevice list, update date and version. Source: SKU matrix (3.7) and the web CMS. Basis: Art. 13(6) requires the information to be complete, up to date and accurate. Owner: PM for devices, web team for date and version.

Battery data

The information printed on the battery label, in full.

Required on this pageBasis: Art. 13(6) giving access to Art. 13(1)–(5), Annex VI part A, Art. 38(6)–(7). Source: factory request part A. Owner: battery manufacturer (supplier); the PM checks it against the pack artwork.

Manufacturer: Dongguan Yubei Electronical Technology Co., Ltd.
856 Jinan Rd, Humen, Dongguan, Guangdong, China
[email protected]
Battery category: Portable battery
Model: YB-LP-405078-4000
Batch or serial number: Printed on the battery, for example 2701-0042⚑
Date of manufacture: Printed on the battery as month and year, for example 01.2027⚑
Place of manufacture: Humen, Dongguan, Guangdong, China⚑
Weight: 78 g⚑
Rated capacity: 4000 mAh (14.8 Wh)⚑
Voltage: 3.7 V nominal, 4.2 V maximum charge⚑
Chemistry: Lithium-ion (Li-ion polymer), lithium cobalt oxide cathode⚑
Hazardous substances (other than mercury, cadmium and lead): Lithium cobalt oxide (CAS 12190-79-3), lithium hexafluorophosphate (CAS 21324-40-3), ethylene carbonate (CAS 96-49-1)⚑
Suitable extinguishing agent: Plenty of water to cool the battery. For fires in the surroundings: CO₂, dry powder or foam.⚑
Critical raw materials above 0.1 % by weight: Lithium, cobalt, graphite, copper, aluminium, phosphorus⚑
Mercury, cadmium, lead: Below the EU limits. No cadmium or lead symbol is required.⚑

EU declaration of conformity

Required on this pageBasis: Art. 13(6), Art. 18; the due diligence report only where Art. 52(3) applies. Source: A17. Owner: battery manufacturer; web team publishes the signed PDF. Replace the file whenever the manufacturer issues a new version and keep old versions on request.

Declaration under Regulation (EU) 2023/1542
Issued by Dongguan Yubei Electronical Technology Co., Ltd., No. YB-DoC-2027-014, 15 January 2027⚑

Download the declaration (PDF)

Due diligence report: Published here if and when it is required (due diligence obligations apply from 18 August 2027).

Replace the battery

You can replace this battery yourself with a standard screwdriver. Choose your device for step-by-step instructions.

Required online, linked hereBasis: Art. 11(1): instructions and safety information on use, removal and replacement, permanently online. Source: SKU matrix (3.7), disassembly protocol (3.8), designer form (step 4). Owner: PM. Add one block for every device model that uses this pack.

NOVA 81 Wireless keyboard (ALU81AWL)

Tool: Phillips PH1 screwdriver
Screws: 4 screws M2×6, two of them under the rear rubber feet
Time: About 10 minutes⚑
Languages: English, German, French, Polish

Open the replacement guide

Before you start

Switch the device off and unplug the USB cable.
Work on a clean, non-metal surface. Keep metal tools away from the battery contacts.
Do not bend, puncture or squeeze the battery. Unplug the connector by its plastic housing, not by the wires.
If the battery is swollen, damaged or hot, stop and follow the safety advice.

Compatible replacement batteries

RecommendedBasis: Art. 11(6); Commission guidelines C(2026) 5032, point 5.1, recommend publishing what a compatible battery must meet. Source: C10. Owner: PM with the supplier.

Type: Rechargeable lithium-ion polymer pack with built-in protection circuit⚑
Voltage: 3.7 V / 4.2 V⚑
Capacity: 4000 mAh
Maximum size: 4.0 × 50 × 78 mm⚑
Connector: 2-pin JST PH, 2.0 mm pitch; red +, black −⚑
Compliance: CE under Regulation (EU) 2023/1542; IEC 62133-2; UN 38.3

Use only a battery that meets this specification. An unsuitable battery can overheat, catch fire or explode.

Spare battery

Recommended on this pageAvailability itself is required. Basis: Art. 11(7): available for at least 5 years after the last unit of the device model is placed on the EU market, at a reasonable and non-discriminatory price for users and independent repairers. Source: D1–D3, 3.10. Owner: PM; links per country from distributors.

Original spare battery DP-BAT-ALU81-4000, recommended retail price €19.90⚑.

Spare batteries are available for at least 5 years after the last NOVA 81 Wireless keyboard is placed on the EU market.

Where to buy

Repair shops can order spare batteries from the same retailers at the same price.⚑

Recycling

Required on this pageBasis: Art. 13(6) giving access to Art. 74(1)(b) and (c). Source: general text by Dark Project; country text and collection link from the distributor or its take-back scheme (3.5). Owner: distributor, checked by the PM.

Do not throw batteries or electronic devices away with household waste. Used batteries are collected separately so they can be recycled safely.

You can return used batteries free of charge, without buying anything.
Take the battery out of the device first if you can do it safely (see Replace the battery). Otherwise hand in the whole device.
The device itself is electronic waste. Take it to a collection point for electrical and electronic equipment.

Collection in

In Germany, return used batteries free of charge wherever batteries are sold and at municipal recycling centres (Wertstoffhof).

Find a collection point Link: takeback-scheme.example/de⚑

What happens to your battery

Collected batteries are sorted by chemistry and sent to licensed recyclers. They recover metals such as cobalt, lithium and copper for new products. A battery that still works can serve as a spare for the same device model.

Safety with used batteries

Required on this pageBasis: Art. 74(1)(d). Source: standard Dark Project text for lithium-ion, checked against the supplier's safety data sheet (A15). Owner: PM.

Before you return a used battery, cover the contacts or connector with tape, or put the battery in its own plastic bag.
Never crush, puncture, open or short-circuit a battery. Keep it away from heat and fire.
If a battery is swollen, damaged, hot or smells unusual, stop using and charging it. Put it on a non-flammable surface away from anything that can burn, and take it to a collection point separately. Tell the staff it is damaged.
If liquid from the battery gets on your skin or in your eyes, rinse with plenty of water and get medical advice.
Keep batteries away from children.

In an emergency anywhere in the EU, call 112.

Lithium batteries thrown into household waste are a frequent cause of fires in bins, collection trucks and sorting plants.

Make the battery last longer

Required on this pageBasis: Art. 74(1)(a). Source: standard Dark Project text, charging limits from the supplier (A3, C10). Owner: PM.

Charge with the supplied USB cable from a computer port or a 5 V USB charger.
Avoid running the battery completely flat.
If you will not use the device for more than a month, leave the battery about half charged and top it up every 3 months.
Do not charge below 0 °C or above 45 °C, and keep the device out of direct sun and away from heaters.
When the battery wears out, replace the battery, not the device.

What the symbols mean

Required on this pageBasis: Art. 74(1)(e). Source: symbols on the approved pack artwork (A16, part B). Owner: PM. List only the symbols that are actually on this battery, plus the bin on the device.

: Crossed-out wheeled bin. Collect separately. Do not put the battery, or the device that contains it, in household waste. The same symbol on the device marks it as electronic waste.
: CE marking. The battery meets EU requirements. See the declaration of conformity.
Li-ion: Chemistry. Lithium-ion battery.
4000 mAh: Capacity. The amount of charge the battery holds when new. The energy in watt-hours is shown next to it.
: QR code. Opens this page.
Cd Pb: Cd or Pb under the bin. The battery contains more than 0.002 % cadmium or more than 0.004 % lead. Not present on this battery.

Effects on health and the environment

Required on this pageBasis: Art. 74(1)(f). Source: standard text plus this battery's substances (A10, A11). Owner: PM.

This battery contains a flammable liquid electrolyte with a lithium salt and a cathode made of lithium cobalt oxide.⚑

A damaged battery, or one thrown into household waste, can short-circuit and catch fire. Burning lithium batteries release toxic and corrosive gases.
Batteries that are littered or end up in landfill can release metals and electrolyte into soil and water, harming people, animals and plants.
Separate collection and recycling avoid these risks and return valuable materials to production.

Contacts

RecommendedManufacturer contact repeats the battery data; support and take-back contacts help visitors act on the page.

Battery manufacturer: Dongguan Yubei Electronical Technology Co., Ltd., [email protected]
Device and replacement support: darkproject.eu/support⚑
Collection in your country: See “Collection in” above.

Battery QR page mockup

Rules for every battery page

Battery information

Battery data

EU declaration of conformity

Replace the battery

NOVA 81 Wireless keyboard (ALU81AWL)

Before you start

Compatible replacement batteries

Spare battery

Where to buy

Recycling

What happens to your battery

Safety with used batteries

Make the battery last longer

What the symbols mean

Effects on health and the environment

Contacts