Customized version of https://www.thingiverse.com/thing:2044282

Created with Customizer! https://www.thingiverse.com/apps/customizer/run?thing_id=2044282

Using the following options:

battery_length = 51
battery_diameter = 15
batteries_per_level = 4.5
levels = 15
ramp_angle = 4
drop_ratio = 2
main_wall = 3.5
side_wall = 1.5
lip_retainer = 2.5
lip_length = 15
lip_cutaway_length = 15
window_size = 5
overlap = 15
gap = 0.3
parts_to_print = both
wall_mount_hole_x_offset = 5
wall_mount_hole_y_offset = -3.5
screw_head_diameter = 7
screw_shaft_diameter = 4
screw_shaft_length_multiplier = 1.4