still a bit buggy but much improved

KAIBatteryCell.h

 @property (nonatomic, strong) UILabel *percentLabel;
 @property (nonatomic, strong) UIImageView *glyphView;
 @property (nonatomic, strong) _UIBatteryView *battery;
-@property (nonatomic, strong) NSLayoutConstraint *width;
-@property (nonatomic, strong) NSLayoutConstraint *height;
 -(instancetype)initWithFrame:(CGRect)arg1 device:(BCBatteryDevice *)device;
 -(void)updateInfo;
 @end

KAIBatteryCell.mm

             [self.label.rightAnchor constraintEqualToAnchor:self.battery.leftAnchor constant:-4.5].active = YES;
         }
 
+        [self.heightAnchor constraintEqualToConstant:(bannerHeight + spacing)].active = YES;
+        [self.widthAnchor constraintEqualToConstant:(self.frame.size.width)].active = YES;
+
     }
 
     return self;
     self.battery.chargePercent = (batteryPercentage*0.01);
 
     [self.glyphView setImage:[self.device glyph]];
-    //[self.heightAnchor constraintEqualToConstant:(bannerHeight + spacing)].active = YES;
-
-    if(!self.height) {
-                
-        self.height.active = NO;
-        self.height = [self.heightAnchor constraintEqualToConstant:(bannerHeight + spacing)];
-        self.height.active = YES;
-
-    } else {
-        int height = (bannerHeight + spacing);
-        self.height.constant = height;
-    }
-
-    if(!self.width) {
-        
-        self.width.active = NO;
-        self.width = [self.widthAnchor constraintEqualToConstant:(self.frame.size.width)];
-        self.width.active = YES;
-
-    } //else {
-        //int width = self.frame.size.width;
-        //self.width.constant = width;
-    //}
 
 }
 

KAIBatteryStack.h

 @interface KAIBatteryStack : UIStackView
-@property (nonatomic, strong) NSMutableArray *displayingDevices;
 @property (nonatomic, assign) NSInteger number;
 @property (nonatomic, assign) NSInteger oldCountOfDevices;
 @property (nonatomic, strong) NSLayoutConstraint *heightConstraint;

KAIBatteryStack.mm

 
 KAIBatteryStack *instance;
 NSTimer *queueTimer = nil;
-//NSMutableArray *showingCells = [[NSMutableArray alloc] init];
 
 @implementation KAIBatteryStack
 
     self = [super init];
     instance = self;
     if (self) {
-        self.displayingDevices = [[NSMutableArray alloc] init];
         self.axis = 1;
         self.distribution = 0;
         self.spacing = 0;
         self.oldCountOfDevices = -100;
         self.queued = NO;
         [self updateBattery];
-        //self.clipsToBounds = YES;
         self.userInteractionEnabled = NO;
     }
     return self;
         }
 
         queueTimer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(dispatchQueue) userInfo:nil repeats:NO];
-        self.isUpdating = NO;
+        //self.isUpdating = NO;
 
         } else if(self.isUpdating) {
             self.queued = YES;
 			self.heightConstraint.active = YES;
 
 		} else {
-            int height;
-            if([self.superview.subviews objectAtIndex:([self.superview.subviews count] - 1)] == self) {
-                height = (self.number * (bannerHeight + spacing));
-            } else {
-		        height = (self.number * (bannerHeight + spacing)) - spacing;
-            }
+		    int height = (self.number * (bannerHeight + spacing)) - spacing;
 			self.heightConstraint.constant = height;
 
 			UIStackView *s = (UIStackView *)(self.superview);

Kai.xm

 	if(self && self.kaiCell == nil) {
 		self.kaiCell = [[KAIBatteryCell alloc] initWithFrame:CGRectMake(0,0,[KAIBatteryStack sharedInstance].frame.size.width,0) device:self]; }
 		((KAIBatteryCell *)self.kaiCell).translatesAutoresizingMaskIntoConstraints = NO;
-		[((KAIBatteryCell *)self.kaiCell).heightAnchor constraintEqualToConstant:bannerHeight + spacing].active = YES;
-
 		[(KAIBatteryCell *)self.kaiCell updateInfo];
 
 	return self.kaiCell;
 -(void)resetKaiCellForNewPrefs {
 	self.kaiCell = [[KAIBatteryCell alloc] initWithFrame:CGRectMake(0,0,[KAIBatteryStack sharedInstance].frame.size.width,0) device:self]; 
 		((KAIBatteryCell *)self.kaiCell).translatesAutoresizingMaskIntoConstraints = NO;
-		[((KAIBatteryCell *)self.kaiCell).heightAnchor constraintEqualToConstant:bannerHeight + spacing].active = YES;
-
 		[(KAIBatteryCell *)self.kaiCell updateInfo];
 }
 %end

Layout/DEBIAN/control

 Package: com.burritoz.kai
 Name: Kai
-Version: 0.9.9~2
+Version: 0.9.9~3
 Architecture: iphoneos-arm
 Description: Show charging banners on your lock screen!
 Maintainer: burrit0z