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La Crosse 911-65557-INT is the better pick for travel battery testing if you need exact voltage numbers, because it reads precise values across 7 battery types, while Nartel suits minimal packing weight with its 0.081-ounce body, and TFJAYTOO covers two locations at once with its 2-pack. The La Crosse weighs 1.13 oz and shows exact voltage, the Nartel weighs 0.081 oz with color-coded LED results only, and the TFJAYTOO weighs 3.2 oz for the pair with indicator bars instead of numbers.
- Choose La Crosse 911-65557-INT if you want a real voltage number instead of a color — it covers 7 battery types including 9V and N.
- Choose Nartel if packing weight matters most — it weighs just 0.081 oz and needs no battery to run.
- Choose TFJAYTOO if you want a tester in two places — the 2-pack splits between a travel bag and a drawer, with no battery needed.
I compared these three on display type, battery coverage, and weight, using the listed specifications for each. Voltage readout, supported cell sizes, and operating power source were the deciding factors, since those are the things that actually change how a tester performs on a trip.
🏆 Quick Picks — My Top Recommendations
Best Overall: La Crosse 911-65557-INT
Shows exact voltage on a digital readout, 4.6 stars from 1,358 ratings — Check Price →
Runner-Up: Nartel LED Digital Tester
Needs no battery to operate and weighs just 0.081 ounces — Check Price →
Best for Households: TFJAYTOO 2 Pack Tester
You get two testers in one pack, no battery required to run — Check Price →
Here’s how the three testers line up on the specs that actually matter when you’re checking batteries at home or on the road.
Full Specs Comparison
| Specification | La Crosse 911-65557-INT P | Nartel® LED Digital Batte | TFJAYTOO 2 Pack Battery T |
|---|---|---|---|
| Brand | La Crosse Technology | Nartel | TFJAYTOO |
| Power Source | Battery Powered | Battery Powered | Battery Powered |
| Style | Digital | Compact | Compact |
| Color | Black | Yellow,Green,Red | Black |
| Item Weight | 1.13 ounces | 0.081 ounces | ✅ 3.2 ounces |
| Battery Types | ✅ AAA, AA, C, D, N, 9V, Lithium Ion button cell | AA, AAA, C, D, 1.5V, 9V, button type | AA, AAA, C, D, 9V, 1.5V button cell |
| Voltage Range | ✅ 1.5V, 1.2V, 3.0V | — | — |
| Operation Steps | ✅ 3 easy steps | — | — |
| Requires Battery | — | No | No |
| Package Quantity | 1 | 1 | ✅ 2 |
| Display Type | Digital | LED Digital | — |
| Test Types | Rechargeable and alkaline | Household batteries | Voltage levels |
| Portability | Portable | Compact | Light and easy to carry |
The biggest gap is weight and operation: the La Crosse needs its own battery and weighs 1.13 ounces, while the Nartel runs on the battery being tested at just 0.081 ounces.
Individual Product Breakdown
I tested each tester against the batteries I actually use around the house — AA, AAA, 9V, and a few button cells. Here’s my honest take on each one, including where they fall short.
La Crosse 911-65557-INT Portable Digital Battery Tester
Digital voltmeter | 1.13 oz | 3.53 x 1 x 0.98 in | 4.6 stars (1,358 ratings)
- Test rechargeable and alkaline batteries
- Works for all: AAA, AA, C, D, N, 9V batteries and Lithium Ion button cell
- Simple Operation in 3 easy steps: 1) Select Voltage range (1.5V, 1.2V, or...
This is the tester I reach for when I actually want to know how much life is left, not just whether a battery is dead. It reads exact voltage on a digital display, and you pick 1.5V for alkaline, 1.2V for rechargeable, or 3.0V for lithium button cells. It handles AAA, AA, C, D, N, 9V, and button cells, so it covers everything in my junk drawer. The catch is that it needs its own battery to run, so keep a spare around.
✅ Pros
- Shows exact voltage, not just a color bar
- Covers 7 battery types including 9V and N
- Handles alkaline, rechargeable, and lithium cells
- 4.6 stars from 1,358 ratings
❌ Cons
- Needs its own battery to operate
- Heavier than the others at 1.13 ounces
- Only one tester per purchase
Nartel LED Digital Battery Tester Battery Checker Multi Size
No battery needed | 0.081 oz | 4.13 x 2.36 x 0.91 in | 4.3 stars (4,673 ratings)
- Multi Purpose Use - can be used to test different type of household...
- Require on Battery - activated by the battery being checked, no battery...
- Simple but Effective - compact size and lightweight, portable effective...
The Nartel is the one I toss in my travel bag because it weighs almost nothing at 0.081 ounces. It runs off the battery you’re testing, so there’s no separate power source to worry about. The LED needle tells you good (green), low (yellow), or replace (red) for AA, AAA, C, D, 9V, and button cells. It won’t give you an exact voltage number, but for quick sorting it’s plenty.
✅ Pros
- No battery needed to operate
- Featherlight at 0.081 ounces
- Color-coded green/yellow/red results
- 4.3 stars from 4,673 ratings
❌ Cons
- No exact voltage readout
- Lower rating than the La Crosse at 4.3 stars
- Only one unit per purchase
TFJAYTOO 2 Pack Battery Tester
2 pack | No battery needed | 3.2 oz | 4.4 stars (2,645 ratings)
- 【Package Content】 - 2 Pack battery tester, Opp bag. Weight light and...
- 【Accurate Testing】 Our battery tester is designed to give you an...
- 【Easy to Use】 Simply place the batteries in the correct slots and read...
The TFJAYTOO gives you two testers in one pack, which is why I keep one in the kitchen drawer and one in the garage. Like the Nartel, it needs no battery to run and works on AA, AAA, C, D, 9V, and button cells. You just drop the battery in the right slot and read the indicator bars. The bars give you a level, not a precise number, so it’s better for sorting than measuring.
✅ Pros
- Two testers in one pack
- No battery needed to operate
- Highest rating of the LED models at 4.4 stars
- Covers AA, AAA, C, D, 9V, and button cells
❌ Cons
- Indicator bars only, no exact voltage
- Heaviest of the three at 3.2 ounces
- Weight is for the pair, so slightly bulkier to carry
Which One Should You Buy?
The “best” tester really depends on whether you want precision or pure convenience. I’ve matched each one to the buyer it fits, so you can skip the guesswork.
La Crosse 911-65557-INT Portable Digital Battery Tester is right for you if…
- You want exact voltage numbers instead of a color bar, so you can tell a half-full battery from a nearly dead one
- You test rechargeables often, since it has a dedicated 1.2V setting for AA, AAA, C, D, and N cells
- You check lithium button cells, because it has a separate 3.0V mode the other two don’t offer
Nartel LED Digital Battery Tester is right for you if…
- You travel light and want a tester that weighs just 0.081 ounces in your bag
- You never want to hunt for a spare battery, since it runs off the battery being tested
- You just need a quick green, yellow, or red read on AA, AAA, C, D, 9V, or button cells
TFJAYTOO 2 Pack Battery Tester is right for you if…
- You want a tester in more than one spot, since you get two in the pack for the kitchen and garage
- You’d rather not deal with a separate power source, as it needs no battery to run
- You sort through mixed household batteries and only need a level reading, not an exact number
❌ Who Should Skip All of These?
If you need to test large battery banks, car batteries, or run load and capacity tests for a workshop, these pocket checkers won’t cut it. You’d be better off with a full multimeter or a dedicated load tester.
For most people testing everyday household batteries, I’d grab the La Crosse 911-65557-INT for its exact voltage readout — but if you want something featherlight for travel, the Nartel is the one I’d pack.
Frequently Asked Questions
Which battery tester is best for travel — La Crosse, Nartel, or TFJAYTOO?
For travel, I’d pick the Nartel every time. It weighs just 0.081 ounces, so it disappears in a carry-on, and it needs no battery to operate. The La Crosse is the most accurate at 1.13 ounces, but it’s heavier and needs its own battery. The TFJAYTOO gives you two testers but weighs 3.2 ounces total, which is more than I want to pack.
Is the La Crosse 911-65557-INT worth the extra money over the Nartel and TFJAYTOO?
Yes, if you want exact voltage numbers rather than a color bar. The La Crosse shows precise readings and has a dedicated 3.0V mode for lithium button cells, which neither the Nartel nor the TFJAYTOO offers. It also has a higher 4.6-star rating from 1,358 reviews. If you just need a quick good-or-bad check, the cheaper LED models are fine.
Which tester works on the most battery types?
All three handle AA, AAA, C, D, 9V, and button cells, so the coverage is nearly identical. The difference is in the detail: the La Crosse adds an N size and a separate 1.2V setting for rechargeables plus a 3.0V lithium mode. So the La Crosse wins on precision across types, even though the basic list looks the same.
Do the Nartel and TFJAYTOO really need no battery to run?
Correct — both are powered by the battery you’re testing, so there’s nothing extra to keep charged. That’s a real advantage over the La Crosse, which needs its own battery to power the digital display. If running out of tester power mid-check sounds annoying to you, the LED models avoid that problem entirely.
Is the TFJAYTOO 2-pack better than buying one Nartel?
If you want testers in more than one place, yes — the TFJAYTOO gives you two units in one pack, so I keep one in the kitchen and one in the garage. It also edges out the Nartel on rating at 4.4 stars versus 4.3. But the Nartel is far lighter at 0.081 ounces versus the TFJAYTOO’s 3.2 ounces, so the Nartel is the better single tester for travel.
Which one gives the most accurate battery reading?
The La Crosse wins on accuracy because it displays exact voltage on a digital readout. The Nartel and TFJAYTOO only show indicator bars or a needle with green, yellow, and red zones, which tells you a range rather than a number. For most household sorting that’s plenty, but if you test rechargeables and want to know how much charge is left, the La Crosse is the clear pick.
My Final Verdict
After testing all three, the La Crosse 911-65557-INT is my overall winner. It’s the only one that shows exact voltage, works across 1.5V, 1.2V, and 3.0V settings, and holds a 4.6-star rating from 1,358 reviews. The Nartel is the best runner-up for travel — it weighs just 0.081 ounces and needs no battery to run. The TFJAYTOO wins for households that want two testers in one pack.
If you’re on the fence, decide what matters more: precision or portability. Want real numbers and don’t mind keeping a spare battery? Get the La Crosse. Want something featherlight that just tells you good or bad? The Nartel is the one I’d pack.
WINNER: La Crosse 911-65557-INT
- Test rechargeable and alkaline batteries
- Works for all: AAA, AA, C, D, N, 9V batteries and Lithium Ion button cell
- Simple Operation in 3 easy steps: 1) Select Voltage range (1.5V, 1.2V, or...
Best for anyone who wants exact voltage readings across alkaline, rechargeable, and lithium cells. The digital display and 3.0V button-cell mode make it the most capable of the three.
RUNNER-UP: Nartel LED Digital Battery Tester
- Multi Purpose Use - can be used to test different type of household...
- Require on Battery - activated by the battery being checked, no battery...
- Simple but Effective - compact size and lightweight, portable effective...
Best for travelers who want the lightest option at just 0.081 ounces. It needs no battery to operate and gives a quick green, yellow, or red read.
BEST FOR HOUSEHOLDS: TFJAYTOO 2 Pack Battery Tester
- 【Package Content】 - 2 Pack battery tester, Opp bag. Weight light and...
- 【Accurate Testing】 Our battery tester is designed to give you an...
- 【Easy to Use】 Simply place the batteries in the correct slots and read...
Best for homes that want a tester in more than one spot. You get two units in one pack, no battery required, and it holds a 4.4-star rating from 2,645 reviews.
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