Cyberpower battery backup cable

Denzel99 · ‎22-08-2026

Hi all,

Can anyone please confirm for me that this cable:

https://ee.co.uk/products/battery-back-up-plus-connecter-cable-for-smart-hub-2-cable-only

...is the correct one to connect the Cyberpower battery backup unit BT are currently sending out? Many thanks.

JimM11 · ‎23-08-2026

@Denzel99 The connector for the back off the CyberPower BBU is the same as the one for the BT Smart Hub 2, Barrel connector 5.5/3.0mm and for anyone who needs the output of the CyberPower is 12V Centre +ve on the cable.

DTB24U12V-BT1 Marked for ONT connection. cyberpower_bbu__for_fttp.pdf

DTB24U12V-BT2 Marked for the SH2 connection.

DTB24U12V-BT3 Marked for the SH2 or the Smart Hub Plus. Both cables supplied 5.5/3.0mm both sides 1.5M length. 5.5/3.0mm to 3.5/1.35mm 1.5M Length..... This is the best for covering as a single unit because it has both cable types supplied, Larger does a ONT/SH2 and the smaller does the EE Smart Hub 6 Plus and possible the SH3 latest when someone does a check on THAT....

The BT1-BT2 appear to be marked up wrong document and cables, where the BT2 does seem to be for the ONT, so going to leave as is above and the user has to do the due diligence to ensure correct connector ends match the documentation.

ONT is for sure a 5.5/2.1mm barrel but the 3.0mm fits no issue.....

View solution in original post

XRaySpeX · ‎22-08-2026

Well, it's for a Smart Hub 2 & only BT has a Smart Hub 2. So it must be!

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To phone EE CS: Dial Freephone +44 800 079 8586 - Option 1 for Home Broadband & Home Phone or Option 2 for Mobile Phone & Mobile Broadband

ISPs: 1999: Freeserve 48K Dial-Up > 2005: Wanadoo 1 Meg BB > 2007: Orange 2 Meg BB > 2008: Orange 8 Meg LLU > 2010: Orange 16 Meg LLU > 2011: Orange 20 Meg WBC > 2014: EE 20 Meg WBC > 2020: EE 40 Meg FTTC > 2022:EE 80 Meg FTTC SoGEA > 2025 EE 150 Meg FTTP

Denzel99 · ‎22-08-2026

Sorry, @XRaySpeX . It seems I wasn't clear enough there.

Yes, it says it's for the Smart Hub 2 BUT is it the correct plug for the socket on the Cyberpower battery unit connected at the other end? That's where the confusion is.

Schockwave · ‎22-08-2026

@Denzel99 , it actually says under specification that it is for the BT Smart Hub 2, so I cannot see what the problem is as the details does say that it connects to the smart hub and cyber power battery unit from what I have read under product details.

To contact EE customer service dial 150 from your mobile phone or ring customer service for free using web based app or another phone: +44 7953 966 or +44 330 123 1105.

JimM11 · ‎22-08-2026

@Denzel99 This is the closest i can see, i have a set of CyberPower cables one was on the ONT and the Other on the EE Smart Hub6+, now the cable marked has Smart Hub (2) on it but was used to connect the ONT up, so one assumes the ONT/SH(2) are as it's the exact same plug for the ONT. The CyberPower plugs are right angled plugs but don't see a cable on Amazon. The one shown on the BT Forum is a NO NO, it's for the new BBU....

If the user has an ONT, get him to try the power connector from that in his BT Smart Hub 2, do not have access to one so cannot say. Cable is 1.5M long CyberPower supplied can take a picture if you need.

kenable DC Power Cable Male to Male 2.1mm x 5.5mm Connector Lead for Low Voltage Devices 0.5m Black:...

The Two pictures for you,

XRaySpeX · ‎22-08-2026

Key features

This cable connects your Smart Hub (2) and Full Fibre Connection Box (ONT/Modem) to the Battery Backup Plus, providing power during outages.
Compatibility: BT Smart Hub 2 (GRV9517UAC34) EE Smart Hub (SH20A)

If you think I helped please feel free to hit the "Thumbs Up" button below.

To phone EE CS: Dial Freephone +44 800 079 8586 - Option 1 for Home Broadband & Home Phone or Option 2 for Mobile Phone & Mobile Broadband

ISPs: 1999: Freeserve 48K Dial-Up > 2005: Wanadoo 1 Meg BB > 2007: Orange 2 Meg BB > 2008: Orange 8 Meg LLU > 2010: Orange 16 Meg LLU > 2011: Orange 20 Meg WBC > 2014: EE 20 Meg WBC > 2020: EE 40 Meg FTTC > 2022:EE 80 Meg FTTC SoGEA > 2025 EE 150 Meg FTTP

Denzel99 · ‎22-08-2026

Sorry, gentlemen. I don't seem to be making the point very clearly. The Smart Hub 2 end (or the ONT end, for that matter) is NOT the question. I know it will connect to the Smart Hub 2...that's what it says. The question is the other end. Does that plug fit the Cyberpower unit BT are sending out?

Let me try a different tac. Is the battery backup unit EE are offering the same one as the Cyberpower model BT are offering?

Denzel99 · ‎22-08-2026

@JimM11 I can see the pictures now. That cable in the top picture looks like the the right thing. Where did you get that from?

JimM11 · ‎22-08-2026

@Denzel99 I fitted two units for my sister on the EE Hub/ONT, she is wheelchair bound Vulnerable status, with the CyberPower version DTB24U12V-BT3 you get Two cables with each BBU, as one set did everything then extra was left over, they are 5.5/2.1mm both sides for the SH2 marked version but was used to the ONT so i assume the same cable for both, the other is a 5.5/2.1mm to a 3.5/1.35mm as used to connect up a EE Smart Hub 6+ as it is now known new name...

JimM11 · ‎22-08-2026

@Denzel99 Link to the new BBU unit and it's cables, do not know if they are the same as a CyberPower connector wise though....

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