5S 21V 40A Li-Ion Lithium Battery Pack Charging Protection Board BMS Charger Protection Board for Makita K
Quick answer
Is $3.89 a good price for 5S 21V 40A Li-Ion Lithium Battery Pack Charging Protection Board BMS…?
It is the usual price, not a deal: $3.89 is in line with the typical price of $3.89 that DipScout measured over the last 12 days. It is the lowest in 12 days, but it has held this price since Nov 3, 2026.
$3.89
Today it costs $3.89 on AliExpress. Since Oct 31, 2026, when we started tracking it, it ranged from $3.89 to $4.18. It's the lowest price in 12 days, but it has been at this value since Nov 3, 2026; by our price history that is already the normal price, not a sale. Price checked on Nov 12, 2026, 00:13 UTC.
No drop compared with what we observed over the last 12 days. The store advertises "was $6.33", but that is the store's own claim; we only state discounts our price history proves.
View on AliExpressThe price above is the last recorded reading, not a live checkout lookup.
Price history
Today$3.89lowest ever seen
Lowest$3.89since Nov 3
Highest$4.18Oct 31 to Nov 2
Tracked since Oct 31 · 2 changesHover over the chart to see each price.Tap the chart to see each price.
See every price change
| When | Price | Change |
|---|---|---|
| Nov 3, 22:17 UTC | $3.89 | −2% |
| Nov 2, 03:09 UTC | $3.97 | −5% |
| Oct 31, 07:02 UTC | $4.18 | start |
| Store | Shop1103205132 Store |
|---|---|
| Positive feedback (AliExpress) | — |
| AliExpress category | Home Appliances › Home Appliance Parts |
| Sold | 19 |
| Recorded readings | 3 |
| First seen | |
| Last reading |