Small UPS/Inverter rental JHB

[Lord.Nikon]

I will be in JHB for 2 weeks for an internship and am going to need to rent a small UPS/Inverter that is capable of powering a 32" Monitor, charging a phone, a router, and a small LED desk light. (and potentially extended a laptops battery life). If I am not mistaken I think i am looking at around 80w - 100w ? (not including charging/powering laptop).
Can anyone recommend a business (ideally in Rivonia/Edenburg) that would be able to help me?

Thank you