Sky-Watcher / Celestron PowerTank 7Ah

Sky-Watcher / Celestron PowerTank 7Ah

  (9 Reviews)
✓ 2 year warranty


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About this product

Model:  sw-power-tank-7ah-20153
Part Number:  20153

Now includes two USB output sockets (5V, 1.5A) and a new multi-angle spotlight with thirty high-output LEDs. 

Take your telescope anywhere with this portable rechargeable power supply.

Not only useful for setting up and powering your scope, this model can also be useful as an emergency roadside accessory, as it includes an emergency light, and for camping holidays. 

Please Note - The DC power cord with car cigarette light plus is within the panel on the back, shown below:


  • Multi-purpose Rechargeable Power Supply suitable for use with most Sky-Watcher and Celestron mountings, and computerised telescopes of other brands requiring a 12V DC power supply. 
  • Built-in 12V 7Ah Sealed Lead Acid Rechargeable Battery with Diagnostic LED Display, Protective Fuse.
  • Built-in Multi-angle with 30 x high-output LED Spotlight
  • 2 x DC 12V output car jack
  • 2 x USB output sockets (5V, 1.5A) 
  • Built-in flashlight with ON/OFF/FLASH function
  • Built-in Circuit Breaker for safety operation
  • DC power cord with car cigarette lighter plug is included
  • Light diffuser for flashlight is included
  • Mains charger, with UK & Euro adaptor plugs

NOTE 1: The Sky-Watcher and Celestron 12V 7Ah Power Tanks are 'identical' so we stock and dispatch whichever brand is most available. 

NOTE 2: Please recharge your PowerTank after every use. Do not fully discharge your PowerTank. If the PowerTank becomes fully discharged through over-use or lack of use it will not accept another charge. 

Customer reviews

Average Rating (9 Reviews):  
Write a Review and share your opinions!

Rating (max 5):  
Good basic power
Monday, 3 February 2020  | 

So far I've only used this to power my HEQ5 and it's done that job just fine. I've dropped a star because the instructions are rubbish and the LED indicators are ambiguous, ie the fully charged light immediately lights up when charging when it obviously is not. Otherwise a good unit for the price.

Rating (max 5):  
Good Product
Thursday, 1 August 2019  | 

I already owned one of these bought about 9 years ago. I hadn't used it for a few years because I temporarily lost interest in astronomy and unfortunately the battery will not charge again. This is normal with lead/acid cells and because of the age of the old one would probably have needed replacement by now anyway. Looking forward to some clear skies as the evenings start to draw in.

Rating (max 5):  
Power pack for celestron telescope
Monday, 20 May 2019  | 

Very good purchase. Instructions very clear. Will make time on astronomy much better

Rating (max 5):  
Excellent Service Again From FLO
Friday, 22 March 2019  | 

Excellent service from First Light Optics yet again! Super quick delivery and everything in perfect working order.

Rating (max 5):  
Really useful power supply
Tuesday, 5 June 2018  | 

This power supply is much more useful than I expected. Not only does it have car power point sockets and usb ports, but it has terminals to connect wires to.
The light is quite powerful, and the red light is useful for preserving night vision, as well as an emergency warning light.
It can be charged either by the supplied mains adapter or from a car power point.

Rating (max 5):  
Power Tank
Monday, 23 April 2018  | 

Excellent item saves me buying batterys to power my SE 6 and a really powerfull spotlight.

Rating (max 5):  
Ideal for Astronomy and Emergencies
Friday, 16 March 2018  | 

Having recently bought a Celestron SE8 nearly all the reviews recommended buying a Power Tank over using 8 AA batteries for better long term economy and reliability. The cost of the unit was much cheaper with FLO than any others I could find (£20 cheaper than Amazon!). Before purchase there seemed to be confusion in forums and reviews over whether needing additional lead as it talks about cigarette lighter but the lead supplied is all that is needed. There are 2 in-built sockets which take the cigarette lighter end and the other end fits the socket next to the on-off button (in SE5,6,and 8).
Only downside (and being picky here) is that once removed from storage area it's unlikely you'll be able to re-pack the connector lead it into the unit - but not a major drawback.

Rating (max 5):  
OK for telescope power
Sunday, 26 April 2015  | 

Firstly, this is a far better way of powering a telescope than using a mains power extension and 12v adapter. I was never happy with a dew covered mains extension, and I was glad to put away the mains adapter for good, and use this unit instead. Using it to power a telescope, even all night, and then putting it on to ‘recharge’ straight away, will give a normal battery life of about 5 years - no problems. However, the main problem with this unit is the lead-acid battery inside which is really designed for short term emergency back up use. If it discharges too much in one go, it will reduce the amount of charge the battery will hold in the future. For instance, dew strips etc if left on full power for several hours will be enough to cause problems. Even accidentally leaving the built-in torch on, will also affect the battery’s ability to recharge again. I whole heartedly recommend this unit for powering a telescope, but employing it for anything else carries the warning that it requires careful monitoring of how far the battery is being discharged.

Rating (max 5):  
Portable power.
Sunday, 22 May 2011  | 

I bought this power tank to use with my astrotrac. Since that's all I use it for I don't think I'm stressing it very much, but it works well and has never let me down. Sometimes I use the red light to make sure I've got everything indoors after a session.

When I recharge the battery using the mains adapter the charging light never seems to go out any more (it used to). I tend to ignore the charging light and use a volt meter to decide when it needs charging. I have read that it is important to keep these types of batteries topped up and never to let them go completely flat.

The unit has plenty of connections and two lights as well as a carrying handle. I think if you look after it then it will serve you well.


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