C7100V (Netgear Nighawak Cable Modem) Battery?

[sm001]

Hello:

I bought this battery backup from amazon for the Netgear Nighthawk C7100V: https://www.amazon.com/gp/product/B08HSZCSYL/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1.  It says PB022, which is the correct model number for the battery. 

However, the battery light kept flashing for 4 days.   When I took the power cable out, the modem went out, so the battery isn't working. 

Before I return the battery, two questions:
1. Is the above amazon link the correct battery?

2. Where can I buy a reliable battery for the C7100V?

Thanks!

SM

[plemans · Accepted solution]

What I'd do? instead of buying a battery for the C7100v, I'd get a ups. 

for roughly the same price, you get more battery power and the option to put a device or 2 on a ups. 

https://www.amazon.com/APC-Battery-Protector-Back-UPS-BE425M/dp/B01HDC236Q

[plemans · Accepted solution]

What I'd do? instead of buying a battery for the C7100v, I'd get a ups. 

for roughly the same price, you get more battery power and the option to put a device or 2 on a ups. 

https://www.amazon.com/APC-Battery-Protector-Back-UPS-BE425M/dp/B01HDC236Q

[sm001]

Thank you.   I hadn't thought about that, but definitely makes more sense.  -SM