diff --git a/scripts/verify-battle-save-normalization.mjs b/scripts/verify-battle-save-normalization.mjs
index 9224d91..e7a2b44 100644
--- a/scripts/verify-battle-save-normalization.mjs
+++ b/scripts/verify-battle-save-normalization.mjs
@@ -71,6 +71,9 @@ try {
     ['unknown unit id', { units: patchUnit(0, { id: 'ghost-unit' }) }],
     ['duplicate unit id', { units: [validState.units[0], { ...validState.units[0], x: 2 }, validState.units[2]] }],
     ['invalid bonds', { bonds: [{ ...validState.bonds[0], unitIds: ['liu-bei'] }] }],
+    ['empty bond id', { bonds: [{ ...validState.bonds[0], id: '' }] }],
+    ['duplicate bond id', { bonds: [validState.bonds[0], { ...validState.bonds[0], unitIds: ['guan-yu', 'liu-bei'] }] }],
+    ['too many bonds', { bonds: Array.from({ length: 129 }, (_, index) => ({ ...validState.bonds[0], id: `bond-${index}` })) }],
     ['unknown bond unit id', { bonds: [{ ...validState.bonds[0], unitIds: ['liu-bei', 'ghost-unit'] }] }],
     ['invalid bond level', { bonds: [{ ...validState.bonds[0], level: 0 }] }],
     ['too high bond level', { bonds: [{ ...validState.bonds[0], level: 101 }] }],
diff --git a/src/game/state/battleSaveState.ts b/src/game/state/battleSaveState.ts
index e784af1..e1a1732 100644
--- a/src/game/state/battleSaveState.ts
+++ b/src/game/state/battleSaveState.ts
@@ -83,6 +83,7 @@ type BattleSaveValidationOptions = {
 const unitDirections = new Set<UnitDirection>(['south', 'east', 'north', 'west']);
 const maxBattleLogEntries = 10;
 const maxBattleLogEntryLength = 96;
+const maxBattleBondEntries = 128;
 const maxTriggeredBattleEventLength = 96;
 const defaultBattleSaveArrayLimit = 128;
 const maxStatusKindsPerUnit = 2;
@@ -310,10 +311,13 @@ function isValidEquipmentProgress(level: unknown, exp: unknown) {
 function isBondArray(value: unknown, options: BattleSaveValidationOptions) {
   return (
     Array.isArray(value) &&
+    value.length <= maxBattleBondEntries &&
+    hasUniqueRecordStrings(value, 'id') &&
     value.every(
       (bond) =>
         isRecord(bond) &&
         typeof bond.id === 'string' &&
+        bond.id.length > 0 &&
         Array.isArray(bond.unitIds) &&
         bond.unitIds.length === 2 &&
         bond.unitIds.every((unitId) => typeof unitId === 'string' && isKnownUnitId(unitId, options)) &&