what to use for a 12v 3amp pump

[marinereef]

i was wondering if someone could give advice, I need a battery to run a 12v 3amp water pump for at least 5hrs.
whats the best battery to use for under $100? a multi purpose battery would be ideal, but im not picky. I looked up some but I dont know if they are any good.... if you know of a better battery than what i found, please tell me. thank you
http://r.ebay.com/WsD3aK
http://r.ebay.com/97iq47
https://www.aliexpress.com/item/Real-capacity-20Ah-12v-20000mah-dc-12v-portable-li-ion-12v-lithium-battery-pack-for-backup/32691718663.html?spm=2114.01010208.3.10.bFWsyO&ws_ab_test=searchweb0_0,searchweb201602_1_10065_10068_10000032_119_10000025_10000029_430_10000028_10060_10062_10056_10055_10000062_10054_10059_10099_10000022_10000012_10103_10000015_10102_10096_10000018_10000019_10000056_10000059_10052_10053_10107_10050_10106_10051_10000053_10000007_10000050_10084_10118_10083_10000047_10080_10082_10081_10110_10111_10112_10113_10114_10115_10000041_10000044_10078_10079_10000038_429_10073_10000035_10121,searchweb201603_9,afswitch_1,single_sort_2_price_asc&btsid=5709357b-bcbf-4974-8dc4-b7b1144adb89

 

[dogman dan]

3 amps of 12v is 36 watt hours. So to be conservative and help avoid deep discharges, figure at least 48 wh per hour of pump use.

So that's about 4 ah of a 12v pack. per hour you run it. A 20 ah pack is the bare minimum you should buy.

Which of those you listed is any good? Who knows?

 

[marinereef]

ok thank you.