Battery Choice for EX-2

[karaka29211]

Is there a recommended main Battery model, I measured the underseat box at 217mm x185mm x 100mm ?
The usual LSA choices locally don't fit in the battery box.

[aeroaddict]

Being an EX-2, battery choises are pretty much left to the builder.

Not sure if there is a 'recommended' battery. There is a battery listed on the CC Store web that can be used for your plane. It specically does not list the EX2, but does list the FX2, which, if I'm not mistaked is the factory assist version of the EX2.

CC Store only list the height, but Aircraft Spruce has the full dimensions.

Where is NZAR?

[40m]

I chose to use an Odyssey SBS J16. Hot or cold, engine or temperature it spins the engine over to a start in 2-3 seconds.
There are lighter options.

2019 EX2

[Daveembry]

I still use what Cubcrafters uses (unless they changed) which is the Odessa PC680. $130, not for certified aircraft

Specifications

• Pulse (5-second) Hot Cranking Amps (PHCA): 520
  Cold Cranking Amps (CCA): 170
  20Hr Nominal Capacity (Ah): 16
  Reserve Capacity Minutes: 24
  Dimensions L x W x H (in): 7.15 x 3.00 x 6.65
  Weight (lbs): 15.4
  Weight (kg): 7

The SBS-J16 is about $190 and is for certified aircraft https://www.odysseybatteries.com/sbsj16.htm. You can see difference in spec. cold cranking amps 50 amps more, weight the same. Size the same.

Specifications

• Nominal Capacity @ C1: 12.3 Ah
• Nominal Capacity @ C/10: 16.0 Ah
• Altitude Rating: -1,500 to 70,000 ft.
• 5 second 80°F (27°C) cranking amps to 7.2V: 680 amps
• CCA @ 0°F (-17.8°C): 220 amps
• CA @ 32°F (0°C): 300 amps
• HCA @ 80°F (27°C): 370 amps
• Reserve Capacity: 25 minutes @25amps
• Terminals: Brass female for M6 stainless steel bolt
• Terminal Torque: 50 in-lb
• Length, in. (mm): 7.15 (181.61)
• Width, in (mm): 3.01 (76.33)
• Height, in (mm): 6.61 (167.77)
• Weight, lb (kg): 15.4 (6.99)
• Resistance at 1kHz @77°F: 7 mOhm
• Short circuit current: >1,800 amps

I chose to use an Odyssey SBS J16. Hot or cold, engine or temperature it spins the engine over to a start in 2-3 seconds.
There are lighter options.

2019 EX2

[40m]

I chose to use an Odyssey SBS J16. Hot or cold, engine or temperature it spins the engine over to a start in 2-3 seconds.
There are lighter options.

2019 EX2

Follow-up
Battery began showing starting stress at approx 150 hours now at 170 will be replaced. Disappointed!
I'm not yet a fan of Lithium based batteries in the plane so searching AGM, any current thoughts?