Market direction turned upward recently with current $88.91 representing 10.5% over standard pricing.
| Price Type | Price | Date |
|---|---|---|
|
Highest Price
|
$88.91 | |
|
Lowest Price
|
$72.00 | |
|
Most Recent Price
|
$88.91 |
Tracking History: We have tracked Schumacher Electric 4.8W Solar Car Battery Maintainer, Amorphous Solar Technology, Water Resistant, 12V Sport, Auto, and Marine Batteries, SP-400 since 1/27/2026. The most recent price update was on Oct 4, 2026.
Price Range: Over the past 90 days, the price has ranged from $72.00 (lowest on 6/21/2026) to $88.91 (highest on 1/27/2026). The average price during this period is $81.04.
Current Trend: Walmart.com prices have ranged from $72.00 (Jul 23) to $88.91 (Oct 4) over the past 90 days. Current price is 10.5% above the 90-day average of $80.46.
Customer Insights: Rated 3.3/5 from 10 reviews.
It kept my car battery charged while it was parked for 10 days at the airport in sub zero weather. I just plugged it in to the cigarette lighter outlet and put the panel on the dash
On time. Works well, and easy to install.
Just started using it 01/01/2017 got to see if it works ok
The SP-400 works great, just be careful- in full sun it outputs 23.5 volts which will fry your 12 volt battery unless you use a charge controller.
I did not charge my battery on my fastback mustang.
Something in my vehicle is drawing power and the battery drains after about 4 days on non-use. Purchased this charger along with the matching overcharge/discharge protector. After reading the manual, it says it is not to be used in the car (unlike the picture on the Walmart website). The panel must be ventilated and they even suggest putting it outside the vehicle. This is not an option when you are parked at an airport, an apartment complex or other public area. I'm not sure how this is even accomplished without crushing the cables in the door. ... Returned for a refund.
They need to use better quality wiring . ??????????
Detailed price history for the past 90 days
Walmart.com prices have ranged from $72.00 (Jul 23) to $88.91 (Oct 4) over the past 90 days. Current price is 10.5% above the 90-day average of $80.46.
| Date | Price | Change | % Change |
|---|---|---|---|
| $88.91 | $+0.00 | +0.0% | |
| $88.91 | $+0.00 | +0.0% | |
| $88.91 | $+16.91 | +23.5% | |
| $72.00 | $+0.00 | +0.0% | |
| $72.00 | $+0.00 | +0.0% | |
| $72.00 | — | — |
