This is what I found out when I was looking for a battery. Ignore the prices because they are in Canadian dollars, not American.
Deka ETX16L ($119)
* Cold Cranking Amps (CCA): 325
* 20Hr Nominal Capacity (Ah): 19
* Reserve Capacity Minutes: N/A
* Metric Dimensions L x W x H (mm): 175 x 100 x 155
* Weight (kg): 7.7
Yuasa GYZ20HL ($149)
* Cold Cranking Amps (CCA): 320
* 20Hr Nominal Capacity (Ah): 20
* Reserve Capacity Minutes: N/A
* Metric Dimensions L x W x H (mm): 175 x 87 x 155
* Weight (kg): 7
Odyssey PC680-P ($169)
* Cold Cranking Amps (CCA): 170
* 20Hr Nominal Capacity (Ah): 16
* Reserve Capacity Minutes: 24
* Metric Dimensions L x W x H (mm): 181.5 x 76.3 x 167.8
* Weight (kg): 7
Odyssey PC925-L ($230) <== Odyssey recommendation
* Cold Cranking Amps (CCA): 380
* 20Hr Nominal Capacity (Ah): 28
* Reserve Capacity Minutes: 52
* Metric Dimensions L x W x H (mm): 168.6 x 179 x 128
* Weight (kg): 11.8
* Installation requires battery to be placed on its back side to dimensionally fit
Yuasa YTX20HL-BS ($119)
* Cold Cranking Amps (CCA): 310
* 20Hr Nominal Capacity (Ah): 18
* Reserve Capacity Minutes: ??
* Metric Dimensions L x W x H (mm): 175 x 87 x 155
* Weight (kg): 7
Kirkland 207270
Lawn and Garden battery, Fitment code 20, group size U1
* Cold Cranking Amps (CCA): 200
* 20Hr Nominal Capacity (Ah): ??
* Reserve Capacity Minutes: ??
* Metric Dimensions L x W x H (mm): 197 x 130 x 184
* Weight (kg): 8.6
