diff --git a/ai.asm b/ai.asm
index 9becaa0..11358b5 100644
--- a/ai.asm
+++ b/ai.asm
@@ -268,6 +268,9 @@ EnoughEnergy
     lda #99
     sta Energy,x
     jsr MaxForceCalculate
+    mva #sfx_battery sfx_effect
+    ldy #7
+    jsr PauseYFrames    ; wait 14 frames (Battery SFX)
 EnoughEnergy
 NoBatteries
     rts
diff --git a/scorch.bin b/scorch.bin
index 03e0467..6537ad0 100644
Binary files a/scorch.bin and b/scorch.bin differ
diff --git a/scorch.xex b/scorch.xex
index 9181280..fbaaff4 100644
Binary files a/scorch.xex and b/scorch.xex differ
diff --git a/scorchC64.prg b/scorchC64.prg
index 0822838..6ca9aa9 100644
Binary files a/scorchC64.prg and b/scorchC64.prg differ
diff --git a/weapons.asm b/weapons.asm
index 7f3fb50..3555b63 100644
--- a/weapons.asm
+++ b/weapons.asm
@@ -3046,7 +3046,7 @@ CheckCollisionWithTankLoop
     lda ActiveDefenceWeapon,x
     cmp #ind_Mag_Deflector      ; first shielded weapon
     bcc CheckCollisionWithNotShieldedTank
-    cmp #ind_Bouncy_Castle  +1    ; last shielded weapon
+    cmp #ind_Bouncy_Castle+1    ; last shielded weapon
     bcc CheckCollisionWithShieldedTank    ; tank with shield is bigger :)
 
     ;lda ShieldEnergy,x        ; there is wrong method to check shield :)