Use correct limit for bytes

lib/src/usage_impl.dart

diff --git a/lib/src/usage_impl.dart b/lib/src/usage_impl.dart
index 00fd280..daaff98 100644
--- a/lib/src/usage_impl.dart
+++ b/lib/src/usage_impl.dart
@@ -271,7 +271,8 @@
     // First check if we have a full batch - if so, send them immediately.
     if (_batchedEvents.length >= _maxHitsPerBatch ||
         _batchedEvents.fold<int>(0, (s, e) => s + e.length) >=
-            _maxHitsPerBatch) {
+            _maxBytesPerBatch) {
+      print("full $_batchedEvents");
       _trySendBatches(completer);
     } else if (!_isSendingScheduled) {
       _isSendingScheduled = true;